FR3068350A1 - NON-CALCINED CEMENT COMPOSITIONS, NON-CALCINED CONCRETE COMPOSITIONS, NON-CALCINED CONCRETE AND METHODS FOR THEIR PREPARATION - Google Patents

Abstract

The present invention relates to non-calcined cementitious compositions comprising inorganic microparticles having a particle size of 1.0 to 100 μm, an aluminum-oxygen-based compound, a colloidal silica and a coagulation control agent, which can be used as as binding material; and relates to non-calcined concrete compositions; the present invention also relates to uncalcined concretes which have properties similar to or better than those prepared with conventional cements. The present invention also relates to methods for the preparation of non-calcined cementitious compositions, non-calcined concrete compositions and non-calcined concretes.

Description

UNCALCINATED CEMENT COMPOSITIONS, UNCALCINATED CONCRETE COMPOSITIONS, UNCALCINATED CONCRETE AND PROCESSES FOR THEIR PREPARATION

Invention background

1. Field of the Invention The present invention relates to a non-calcined cementitious composition comprising inorganic microparticles, which is useful as a binder material; a non-calcined concrete composition; and non-calcined concrete, which has physical and mechanical properties similar to or better than those prepared with traditional cements. The present invention also relates to methods for preparing the non-calcined cement composition, the non-calcined concrete composition and the non-calcined concrete.

2. Description of the Related Art [002] Cement is a generic term for the binder materials commonly used in building materials, and is one of the most important building materials to date. Portland Cernent Association statistics indicate that global cement consumption was around 4.1 billion tonnes in 2015, which proves the importance of cements. The most commonly used cement is Portland cement, the main components of which are derived from limestone, clay, silica ore, slag and other materials. However, most of these materials are obtained by the exploitation of natural minerals, which has a considerable impact on the environment. In addition, calcination at high temperatures is necessary in the preparation of cements due to the use of limestone and other raw materials, which consumes a lot of energy and generates considerable carbon emissions. In addition, the estimated remaining productive life of limestone minerals in China and Taiwan is only around 50 years or less. These problems, including a lack of building materials, are potential problems in environmental protection.

[003] Consequently, attempts have been made to use alternative raw materials in the industry in order to reduce the consumption of natural resources and carbon emissions during the cement manufacturing process. A cementitious material without lime is an alkali activated cement, which is prepared by the polymerization of a silico-aluminate (fly ash) with sodium silicate (liquid glass) in the presence of a strong alkali. It is, however, associated with potential problems of excessive shrinkage, heat generation during the mixing process, cracking of the finished products, production of salt crystals on the surface, and other problems. Also, the use of a large amount of strong alkali can easily lead to corrosion and oxidation of the steel material, causing an undesirable impact on the late strength of the structure. The use of a large amount of strong alkali limits its potential for large-scale application. In addition, an alkali activated cement needs to be catalyzed at elevated temperature for several hours before setting. Therefore, there are still many restrictions on the practical viability of alkali activated cement.

Document TW 1491579 B (corresponding to document US 8 562 734 B2) discloses a composition of cementitious material low in calcium, in which fly ash low in calcium, an alkali and a solidifying agent are in particular used, mixed at room temperature, and rested to form a cementitious material poor in calcium. This invention is mainly characterized by the use of a solidifying agent to solve the problem that it is necessary to add an additional component containing calcium when low-calcium fly ash is used as is known in the art.

Document WO 2011/008463 A1 discloses the use of a cementitious composition comprising (1) at least one inorganic filler, (2) colloidal silica, colloidal alumina or a mixture thereof, forming a binder phase after cooking, and (3) a carrier fluid. However, the cementitious composition needs to be calcined at high temperature (at least 1000 ° C.) in the presence of a source of fluorine in order to form a binder phase.

Therefore, there remains a significant need for a cementitious binder which minimizes the impact on the environment during the manufacturing process and which can be easily applied to a large-scale application.

Summary of the invention [007] In order to achieve the above-mentioned objectives, the present invention provides an unc calcined cement composition, comprising:

(a) inorganic microparticles having a particle size in the range from 1.0 to 100 μm in an amount of approximately 31% to 87% relative to the total weight of the composition;

(b) a compound based on aluminum and oxygen;

(c) nanocolloidal silica; and (d) a coagulation regulatory agent.

After mixing the components in the composition, without calcination, the composition can serve as a binder as does the cement in the building material.

The present invention also provides a composition of non-calcined concrete, comprising:

(a) inorganic particles in an amount of about 66% to 92% relative to the total weight of the composition;

(b) a compound based on aluminum and oxygen;

(c) nanocolloidal silica; and (d) a coagulation regulating agent, wherein the inorganic particles comprise inorganic microparticles having a particle size between 1.0 and 100 µm, and the inorganic microparticles account for 25% to 45% of the total weight of the inorganic particles. After mixing the components in the composition, the composition exhibits, without calcination, mechanical properties similar to those of a concrete prepared with a conventional cement, and better volume stability than the latter.

The present invention also provides non-calcined concrete comprising a non-calcined cement composition or a composition of non-calcined concrete.

The present invention also provides a method for preparing a non-calcined cement composition, comprising a step of combining inorganic microparticles, a compound based on aluminum and oxygen, a nanocolloidal silica and d 'a coagulation regulating agent.

The present invention also provides a method for preparing a non-calcined concrete composition, comprising a step of combining inorganic particles, a compound based on aluminum and oxygen, a nanocolloidal silica, and a coagulation regulating agent.

Summary of the invention All the numerical values expressing contents, proportions, physical characteristics and the like, used in this description as well as in the claims, should be interpreted as being modified by the term approximately in all cases. Consequently, unless otherwise indicated, the values presented in the description which follows and in the appended claims may vary depending on the characteristics provided and / or desired of the present invention. Without limiting the application of the principle of equivalence to the scope of the claims, the numerical parameters should be interpreted at least on the basis of the number of significant figures given and by application of a general rounding method.

All of the ranges disclosed herein should be interpreted to include any and all of the subintervals encompassed herein. For example, the range from 1 to 10 should be considered to include any and all of the subintervals between minimum value 1 and maximum value 10, limits included; that is, all subintervals starting with a minimum value of 1 or more and ending with a maximum value of 10 or less, for example, 1 to 6.7, 3.2 to 8.1 or 5.5 to 10; and encompassing any and all of the numeric values in the ranges, for example: 1, 3.1, 5.2, or 8.

The term approximately disclosed herein refers to an approximate range which is understood by those with ordinary knowledge of the technique to which this invention relates, and the approximate range is correlated to different physical characteristics or quantities. For example, the term approximately includes a range of ± 10%, ± 5%, ± 2%, or ± 1% of the value shown.

The composition made available in the present invention comprises inorganic (micro) particles, a compound based on aluminum and oxygen, a nanocolloidal silica, and a coagulation regulating agent. The components are described in detail below.

A. Inorganic Particles The inorganic particles contained in the composition of the present invention include inorganic particles containing at least one of silicon and aluminum, for example, a substance formed by at least one of silicon and aluminum with various metallic or non-metallic elements. The metallic elements may include, for example, an alkali, an alkaline earth metal, metalloid elements and transition metals, and the non-metallic elements may include, for example, carbon, hydrogen, oxygen, nitrogen, boron, phosphorus, sulfur, halogens and the like. Examples include, but are not limited to, an oxide (e.g., silicate and silica) and a carbide (e.g., silicon carbide) of silicon; various compounds formed by silicon, aluminum, and oxygen; or a combination of these compounds. Other inorganic ingredients may be optionally present, for example, various substances formed by the above metallic and / or non-metallic elements, for example, various compounds containing calcium, magnesium, boron, carbon, nitrogen, and oxygen, or any combination of these compounds. For example, inorganic particles can be derived from various natural rocks or minerals, quartz sand, terrestrial sandstone, silica sand, river sand, sea sand, silt or any combination thereof, and impurities inevitable that they contain. According to a specific embodiment, the inorganic particles comprise quartz sand, gravel or both, and the quartz sand and gravel can be mixed in any proportion when both are present.

The non-calcined cement composition described in the present invention comprises inorganic particles having a particle size situated in the range from 1.0 to 100 μm, which are here qualified as inorganic microparticles. The inorganic microparticles constitute a main component of the non-calcined cement composition, and account for approximately 31% to 87%, preferably 42% to 81%, and better still 52% to 76% of the total weight of the non-calcined cement composition.

In the non-calcined concrete composition described in the present invention, the inorganic particles are present in the highest content, which is approximately 66% to 92%, preferably 72% to 90%, and better still from 74% to 86% of the total weight of the non-calcined cement composition.

In the non-calcined concrete composition made available in the present invention, the particle size of the inorganic particles is not particularly limited, and may be on a scale ranging from nanometers to millimeters, provided that at least part inorganic particles, ie inorganic microparticles, and inorganic microparticles count for 25% to 45%, preferably 27% to 43%, and better still 30% to 40% of the total weight of the inorganic particles.

In one embodiment of the present invention, the inorganic microparticles can have a particle size in the range from 1.0 to 1.3 pm, from 1.3 to 1.6 pm, from 1.6 to 2.6 pm, 2.6 to 6.5 pm, 6.5 to 8.0 pm, 8.0 pm to 10.0 pm, 10.0 to 13.0 pm, 13.0 at 28.0 pm, from 28.0 to 38.0 pm, from 38.0 to 45.0 pm, from 45.0 to 50.0 pm, from 50.0 to 53.0 pm, from 53.0 at 58.0 pm, from 58.0 to 75.0 pm, from 75.0 to 86.0 pm, and from 86.0 to 100.0 pm, or in any range made up of any of the above limits as the upper limit and lower limit of this range. Alternatively, the inorganic microparticles may have a particle size corresponding to any of the above limits, for example about 1 µm, about 1.3 µm, about 1.6 µm ... about 8.0 µm, about 10.0 pm, about 13.0 pm ... about 50.0 pm, about 58.0 pm, about 75.0 pm, about 86.0 pm, and about 100 pm.

In one embodiment of the present invention, the inorganic microparticles have a unimodal particle size distribution. In another embodiment, the particle size distribution is bimodal or multimodal, and the distribution model can be any combination of one or more sets of isolated particle sizes or one or more sets of particle size ranges. For example, in one embodiment, the inorganic microparticles may, for example, have a unimodal particle size distribution from 1 µm to 2.6 µm; a unimodal particle size distribution of about 1.3 µm; a unimodal particle size distribution of approximately 1.6 µm; a unimodal particle size distribution of 8.0 to 13.0 µm; a unimodal particle size distribution of about 8.0 µm; a unimodal particle size distribution of about 10.0 µm; a bimodal particle size distribution of from 1 to 2.6 µm and from 6.5 to 13.0 µm; a bimodal particle size distribution of approximately 1.0 pm bimodal particle size distribution of approximately 1.6 pm bimodal particle size of 6.5 to 13.0 pm bimodal particle size of 6.5 to 10.0 pm bimodal particle size of 8.0 to 10 , 0 µm bimodal particle size of about 10 µm bimodal particle size of about 6.5 µm bimodal particle size of about 10.0 µm and about 8.0 µm; a distribution and about 13.0 µm, a distribution and from 45.0 to 58.0 µm; a distribution and from 50.0 to 58.0 µm; a distribution and from 50.0 to 53.0 µm; a distribution and about 45.0 µm; a distribution and about 50.0 µm; a distribution and about 50.0 µm; a bimodal particle size distribution of approximately 10.0 μm and from 45.0 to 50.0 μm; a bimodal particle size distribution of about 8.0 µm to 10.0 µm and 50.0 µm; a trimodal particle size distribution of 1.0 to 2.6 µm, 6.5 to 13.0 µm, and 45.0 to 58.0 µm; a trimodal particle size distribution from 1.6 to 2.6 pm, from 6.5 to 10.0 pm, and from 45.0 to

50.0 µm; a trimodal particle size distribution of 1.6 to 2.6 µm, 6.5 to 10.0 µm, and 45.0 to 75.0 qm; a trimodal particle size distribution of approximately 1.6 pm, approximately 8.0 gm, and approximately 50.0 μιη; a trimodal particle size distribution of approximately 1.0 μιη, approximately 10.0 μηι, and approximately 50.0 μιη; a trimodal particle size distribution of approximately 1.6 qm, approximately 10.0 qm, and approximately 45.0 qm;

a trimodal particle size distribution of approximately 1.6 qm, approximately 10.0 qm, and approximately 50.0 qm; a trimodal particle size distribution of approximately 1.3 qm, approximately 8.0 qm, and approximately 58.0 qm; a trimodal particle size distribution of approximately 1.6 qm, approximately 13.0 qm, and approximately 75.0 qm; and a tetramodal, pentamodal, and hexamodal particle size distribution of all combinations, etc.

Inorganic microparticles having a bimodal or multimodal particle size distribution can also be qualified as calibrated particles. The particle size distribution having a specific distribution model can be obtained by sieving the particles as a function of the particle size and then by mixing the particles having corresponding sizes. For example, large inorganic particles can be ground dry or wet into small inorganic particles, and then subjected to air classification to obtain inorganic microparticles with a narrow particle size distribution, which are further mixed to obtain a desired size distribution model. When the particle size distribution is bimodal, the particles having a maximum particle size or particle size range can count, independently of each other, for at least about 30% to about 70%, for example, about 30%, about 35%, approximately 40%, approximately 45%, approximately 50%, approximately 55%, approximately 60%, approximately 65%, approximately 70%, etc., of the total weight of the inorganic microparticles. When the particle size distribution is trimodal, particles with a maximum particle size or particle size range can count, independently of each other, for at least about 20% to about 50%, for example, about 20%, about 25%, about 27%, approximately 29%, approximately 30%, approximately 31%, approximately 33%, approximately 35%, approximately 37%, approximately 40%, approximately 45%, approximately 50%, etc., of the total weight of the inorganic microparticles. Without being bound by theory, the use of calibrated particles in the non-calcined cement composition or the non-calcined concrete composition can improve the physical and mechanical performance of the prepared concrete (for example, compressive strength, etc. .).

The particle size of the inorganic particles can also be on a millimeter scale and in the range from> 0.1 mm to 50.0 mm.

Alternatively, without being bound by theory, the particle size of the inorganic particles can also be on a nanometric scale.

The inorganic particles contained in the composition of the present invention do not need to be calcined but they must always allow the composition to have the property of a binder material after they have been mixed with other components in the composition. After the components have been mixed, a binder material having properties similar to that of a conventional cement is prepared, as a result of which carbon emissions are considerably reduced and energy savings are achieved.

B. Compound Based on Aluminum and Oxygen The compound based on aluminum and oxygen contained in the composition of the present invention is a material mainly composed of aluminum and oxygen and, when it is in the form of a compound, it can be an aluminum oxyacid and derivatives thereof (for example, a salt, such as an alkali or alkaline earth metal salt), an oxide of aluminum and aluminum hydroxide; and it can also comprise a mixture mainly composed of these compounds. Examples include, but are not limited to, sodium aluminate, calcium aluminate, alumina, aluminum hydroxide, and aluminous cement, or any combination thereof. Without being bound by theory, the compound based on aluminum and oxygen has the function of stabilizing the coagulation between the components in order to provide stable physical properties similar to those of cement.

In the non-calcined cement composition of the present invention, the content of the compound based on aluminum and oxygen can be, but not limited to, at least 1.9%, at least at least 4.2%, at least 5.0%, at least 8.0% and at least

9.5% of the total weight of the composition; and it can also be, but not limited to, 21.0% at most, 18.0% at most, 14.5% at most, 8.5% at most, 7.5% at most ; not more than 6.0% and not more than 5.0% of the total weight of the composition; or any range consisting of the above values serving as the upper limit and the lower limit of this range.

In the non-calcined concrete composition of the present invention, the content of the aluminum and oxygen-based compound can be, but is not limited to, at least 1.1%, of at least 2.2%, at least 2.8%, at least 4.8%, and at least

5.5% of the total weight of the composition; and may also be, but not limited to, 12.0% at most, 10.0% at most, 8.0% at most, 5.5% at most, 5.0% in more, at most 3.0%, and at most 2.0% of the total weight of the composition; or any range consisting of the above values serving as the upper limit and the lower limit of this range.

In a preferred aspect, the aluminum and oxygen-based compound comprises aluminum hydroxide or a mixture containing aluminum hydroxide, which can improve the strength of the concrete after setting at temperature high.

C. Nanocolloidal Silica The nanocolloidal silica contained in the composition of the present invention is a usually known particulate silica, suspended in a liquid phase and having a nanometric particle size. Nanocolloidal silica can also be aggregated to form a large particle or to form a reticular structure. Nanocolloidal silica can be commercially available or be prepared with a material containing silicon.

The solid content of the nanocolloidal silica can be from 20 to 50% by weight, preferably from 30 to 48% by weight, and better still from 35 to 45% by weight, for example, around 20, about 25, about 30, about 35, about 36, about 37, about 38, about 39, about 40, about 42, about 44, about 45, about 46, about 48, and about 50% by weight; or any range consisting of the above values serving as the upper limit and the lower limit of this range. The particle size of the particulate silica contained in the nanocolloidal silica can be from 8 to 90 nm, preferably from 10 to 85 nm, and better still from 15 to 80 nm; or can be about 8, about 10, about 15, about 18, about 30, about 50, about 60, about 80, and about 90 nm; or any range consisting of the above values serving as the upper limit and the lower limit of this range.

Nanocolloidal silica can also have a bimodal particle size distribution, for example, of approximately 10 nm and approximately 90 nm, approximately 18 nm and approximately 90 nm, approximately 18 nm and approximately 80 nm , approximately 10 nm and approximately 80 nm, approximately 10 nm and approximately 30 nm, approximately 30 nm and approximately 80 nm, approximately 10 nm and approximately 50 nm, and various combinations. When the particle size distribution is bimodal, the particles having a maximum particle size or particle size range can count, independently of each, for at least 30% to 70%, for example, about 30%, about 35%, about 40%, about 45%, approximately 50%, approximately 55%, approximately 60%, approximately 65%, and approximately 70% of the total weight of the nanocolloidal silica. The particle size distribution having a specific distribution model can be obtained by mixing nanocolloidal silicas having different particle sizes.

In the non-calcined cement composition of the present invention, the nanocolloidal silica content can be, but not limited to, from 17.0% to 36%, preferably from 19.0% to 33.0% , and better still from 21.0% to 32.0% of the total weight of the composition.

In the non-calcined concrete composition of the present invention, the nanocolloidal silica content can be, but not limited to, from 8.5% to 17.0%, preferably from 9.5% to 15 , 0%, and better still from 10.5% to 13.0% of the total weight of the composition.

D. Coagulation regulating agent The function of the coagulation regulating agent contained in the composition of the present invention is to regulate the coagulation time of the components in the mixture, so that a desired application time can be planned. Examples include hydroxycarboxylic acid or a salt thereof, a starch ether or a functionalized starch ether and the like, for example, citric acid, tartaric acid, gluconic acid, salicylic acid and a alkali metal salt of these acids, hydroxymethyl starch-ether, hydroxyethyl starch-ether, hydroxypropyl starch-ether or any combination thereof.

In the non-calcined cement composition of the present invention, the content of the coagulation regulating agent can be, but is not limited to, 0.2% to

6.5%, preferably from 1.0% to 5.5%, and better still from 2.2% to 5.0% of the total weight of the composition.

In the non-calcined concrete composition of the present invention, the content of the coagulation regulating agent can be, but is not limited to, 0.15% to

3.5%, preferably from 0.6% to 3.0%, and better still from 1.1% to 2.5% of the total weight of the composition.

E. Optional Additives The composition of the present invention also comprises one or more optional additives, for example, but not limited to, a coagulation aid, an active silica, a water reducing agent, and so on. next, for the purpose of checking the composition so that it meets different requirements. A detailed description is presented below.

(i) Coagulation aid The composition of the present invention can also comprise a coagulation aid intended to further facilitate the coagulation reaction between the components of the present invention. The coagulation aid comprises an oxide, hydroxide, sulphate or carbonate of an alkali metal or of an alkaline earth metal. Examples include, but are not limited to, lithium oxide, magnesium oxide, calcium oxide, barium oxide, sodium hydroxide, magnesium hydroxide, hydroxide calcium, barium hydroxide, sodium sulfate, magnesium sulfate, calcium sulfate, lithium carbonate, and so on.

Consequently, in a preferred aspect of the present invention, a non-calcined cementitious composition containing a coagulation aid is provided, which comprises:

(a) inorganic microparticles having a particle size in the range from 1.0 to 100 µm at a rate of from about 30% to 86%, preferably from 40% to 80%, and more preferably from 50% to 74% relative to the total weight of the composition;

(b) an aluminum-oxygen compound of a content which may be, but not limited to, at least 1.8%, at least 4.0%, at least at least 4.8%, at least 8.0%, or at least 9.2% of the total weight of the composition; or may be, but not limited to, 20.0% at most, 17.5% at most, or 12.5% at most of the total weight of the composition; or any range consisting of the above values serving as the upper limit and the lower limit of this range;

(c) a nanocolloidal silica of a content which can be, but not limited to, from 15.0% to 35.0%, preferably from 18.0% to 32.0%, and better still from 20 0.0% to 30.0% of the total weight of the composition;

(d) a coagulation regulating agent of a content which can be, but not limited to, from 0.18% to 6.0%, preferably from 0.9% to 5.0%, and better still from 2.0% to 4.5% of the total weight of the composition; and (i) a coagulation aid of a content which may be, but is not limited to, at least 2.2%, at least 2.6% or at least 3.0%; or at most 6.5%, at most 5.8%, at most 5.0% or at most 3.0% of the total weight of the composition; or any range consisting of the above values serving as the upper limit and the lower limit of this range.

After mixing the components in the composition, without calcination, the composition can be used as a binder material just like cement does in construction materials.

In addition, in a preferred aspect of the present invention, a non-calcined concrete composition containing a coagulation aid is provided, which comprises:

(a) inorganic particles in an amount of approximately 65% to 90%, preferably 68% to 88%, and better still 70% to 85% relative to the total weight of the composition;

(b) an aluminum-oxygen compound of a content which may be, but not limited to, at least 1.0%, at least 2.0%, at least minus 2.5%, at least

4.6%, or at least 5.2% of the total weight of the composition; or may be, but not limited to, 10.0% at most, 8.5% at most, 6.0% at most, 5.2% at most, 4.6% at most , 2.5% at most, or 2.0% at most of the total weight of the composition; or any range consisting of the above values serving as the upper limit and the lower limit of this range;

(c) a nanocolloidal silica of a content which can be, but not limited to, from 7.5% to 15.0%, preferably from 9.0% to 13.0%, and better still from 10 0.0% to 12.5% of the total weight of the composition;

(d) a coagulation regulating agent of a content which can be, but not limited to, from 0.1% to 3.0%, preferably from 0.5% to 2.5%, and better still from 1.0% to 2.2% of the total weight of the composition; and (i) a coagulation aid, comprising an oxide, hydroxide, sulphate or carbonate of an alkali metal or of an alkaline earth metal, of a content which may be, but is not limited to, at least minus 1.0%, at least 1.5% or at least 2.0%; or not more than 3.0%, not more than 2.8%, not more than 2.4% or not more than 2.0% of the total weight of the composition; or any range consisting of the above-mentioned values serving as upper limit and lower limit of this range, composition in which the inorganic particles comprise inorganic microparticles having a particle size in the range from 1.0 to 100 μm, and inorganic microparticles account for 25% to 45% of the total weight of inorganic particles.

(II) Active silica The active silica useful in the composition of the present invention is a known conventional silica having a low overall density and a high specific surface. Without being bound by theory, the addition of the active silica to the composition makes the cementitious material formed with the composition of the present invention more waterproof so that the composition of the present invention has a wider range of applications. The conventional active silica can be an amorphous silica, such as a fumed silica and a precipitated silica, the primary particles of which are on the nanometric scale and can also be aggregated to form micro-aggregates on the micrometric scale. The particle size of the primary particles of fumed silica can be, for example, but not limited to, from 5 to 50 nm; the particle size of the micro-aggregates formed can be, but is not limited to, from 1 to 20 μm; and the specific surface can be, but not limited to, from 50 to 600 m ² / g, for example, from 140 to 220 m ² / g. The particle size of the primary particles of precipitated silica can be, for example, but not limited to, from 5 to 100 nm; the particle size of the micro-aggregates formed can be, but is not limited to, from 1 to 40 μm; and the specific surface can be, but not limited to, from 5 to 100 m ² / g.

In the non-calcined cement composition of the present invention, the content of active silica can be, but is not limited to, at least 0.3%, at least 0.5%, at least 0.8%, at most 5.0%, at most 4.5%, or at most 4.2% of the total weight of the composition, or any range formed by any combination of these values serving as the upper limit and the lower limit of this range.

In the non-calcined concrete composition of the present invention, the content of active silica can be, but is not limited to, at least 0.2%, at least 0.3%, d '' at least 0.5%; not more than 2.5%, not more than 2%, or not more than 1.8% of the total weight of the composition, or any range formed by any combination of these values serving as upper limit and limit lower of this range.

(iii) Water reducing agent The water reducing agents useful in the present invention are those which facilitate the absorption of water after the components have been mixed in the composition. Examples include water reducing agents based on lignin, water reducing agents based on naphthalenesulfonic acid, water reducing agents based on water soluble resin, and polycarboxylic acids, for example , calcium ligninsulfonate, sodium ligninesulfonate, magnesium ligninesulfonate, sulfonated lignin, naphthalenesulfonates, coumarone resin, and so on.

The non-calcined cement composition of the present invention may exhibit behavior similar to that of cement and meet the property requirements in accordance with the construction specifications after the components have been mixed at room temperature. Since the raw materials used do not include limestone, the main component of conventional cements, as an essential component, non-calcined concrete (even if it may contain limestone) having properties comparable to or better than that of concrete existing can be prepared with the non-calcined concrete composition of the present invention without calcination. Therefore, the energy required for calcination at high temperature is considerably reduced, and the pollution problem due to calcination at high temperature is avoided. Without being bound by theory, carbon emissions can be reduced from at least about 40% to about 70% by using the non-calcined cement composition of the present invention in comparison with conventional Portland cement. In addition, the raw materials used are more environmentally friendly and easily accessible, and have less impact on the environment, thereby reducing environmental and economic costs.

Method for the preparation of a non-calcined cement composition The non-calcined cement composition of the present invention is formed by combination of the components chosen. In a preferred aspect of the present invention, the uncalcined cementitious composition is packaged in two portions, one comprising the inorganic microparticles as well as the aluminum and oxygen-based compound, and the other comprising the nanocolloidal silica thus as the coagulation regulating agent. Preferably, the two portions are not in mutual contact during the shipment or before the use of the composition. In another preferred aspect of the present invention, the uncalcified cementitious composition of the present invention is packaged in two portions, one comprising the inorganic microparticles, the aluminum and oxygen compound as well as the processing aid. coagulation, and the other comprising nanocolloidal silica as well as the coagulation regulating agent. Preferably, the coagulation aid is not in contact with the nanocolloidal silica during shipment or before the use of the composition. In one aspect, the non-calcined cement composition is packaged in two portions, one comprising all of the components in the form of a solid, and the other comprising the components in the form of a liquid (e.g., a solution , a suspension, or a floor). Preferably, the two portions are not in mutual contact during the shipment or before the use of the composition.

Method for the preparation of a non-calcined concrete composition The non-calcined concrete composition of the present invention is formed by combining the selected components. In a preferred aspect of the present invention, the uncalcined concrete composition is packaged in two portions, one comprising the inorganic particles (including inorganic microparticles) and the aluminum and oxygen compound, and the other comprising nanocolloidal silica as well as the coagulation regulating agent. Preferably, the two portions are not in mutual contact during the shipment or before the use of the composition. In another preferred aspect of the present invention, the uncalcined concrete composition of the present invention is conditioned in two portions, one comprising the inorganic particles (including inorganic microparticles), the aluminum-based compound and d oxygen as well as the coagulation aid, and the other comprising nanocolloidal silica as well as the coagulation regulating agent. Preferably, the coagulation aid is not in contact with the nanocolloidal silica during shipment or before use of the composition. In one aspect, the uncalcined concrete composition is packaged in two portions, one comprising all of the components in the form of a solid, and the other comprising the components in the form of a liquid (for example, a solution, suspension, or soil). Preferably, the two portions are not in mutual contact during the shipment or before the use of the composition.

Method for preparing non-calcined concrete Most of the components contained in the non-calcined cement composition and the non-calcined concrete composition of the present invention require no calcination, and only a few components require pretreatment by calcination at low temperature ( for example, the optional coagulation aid, such as magnesium oxide).

Concrete generally comprises a binder material (cement), water, an aggregate, and other components. The aggregate can be any material applicable in engineering, for example, materials derived from various natural rocks or ores, quartz sand, terrestrial sandstone, silica sand, river sand, sea sand, silt or any combination of these, and the inevitable impurities they contain. In one embodiment, the inorganic particles include quartz sand, gravel or both, and the quartz sand and gravel can be mixed in any ratio when the two are present.

Therefore, the non-calcined cement composition of the present invention can be used as a binder material for the preparation of non-calcined concrete. For example, the non-calcined cementitious composition of the present invention can be mixed with the aggregate and the other components to prepare a concrete. For example, the aggregate may first be mixed with the inorganic microparticles, and then with the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica as well as the coagulation regulating agent can be added and the components are mixed so as to obtain a non-calcined concrete. Furthermore, the components other than the nanocolloidal silica and the coagulation regulating agent can be mixed until uniformity, and then the nanocolloidal silica as well as the coagulation regulating agent can be added successively or simultaneously and the components are mixed in order to prepare non-calcined concrete.

In the case where an uncalcined concrete is prepared with an uncalcified cementitious composition comprising the addition of an additional optional component (for example, one or more from a coagulation aid, an active silica, and a reducing agent water), the aggregate is first mixed with the inorganic microparticles, and then with the coagulation aid and the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed so as to obtain an uncalcined concrete. In another aspect, the aggregate and the inorganic microparticles are mixed first, and then with the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica, the coagulation regulating agent and the active silica are added and the components are mixed so as to obtain an uncalcined concrete. In another aspect, the aggregate is mixed with the inorganic microparticles, and then with the aluminum-oxygen compound and the coagulation aid uniformly; and thereafter, the nanocolloidal silica, the coagulation regulating agent and the active silica are added and the components are mixed so as to obtain an uncalcined concrete. In another aspect, the aggregate is mixed with the inorganic microparticles, and then with the water reducing agent and the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed so as to obtain an uncalcined concrete. Alternatively, in the above aspects, the components other than nanocolloidal silica, the coagulation regulating agent and the active silica (if present) are mixed uniformly first, and then nanocolloidal silica, The coagulation regulator and active silica (if present) are added and the components are mixed to prepare an uncalcined concrete. Alternatively, in the above aspects, the components in the form of a solid are first mixed, and then the components in the form of a liquid (for example, a solution, a suspension, or a sol ) are added and the components are mixed to prepare an uncalcined concrete.

In addition, the concrete can also be prepared with the non-calcined concrete composition made available in the present invention. The inorganic particles are mixed uniformly at first, and then the other components are added to prepare an uncalcined concrete. For example, the inorganic particles are mixed with the inorganic microparticles in a proportion as described above, and then with the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed so as to obtain an uncalcined concrete. In one embodiment in which concrete is prepared with an uncalcined concrete composition comprising the addition of an additional optional component (e.g., one or more of a coagulation aid, active silica and a reducing agent) water), the inorganic particles are mixed with the inorganic microparticles in a proportion as described above, and then with the aluminum and oxygen compound and the coagulation aid uniformly; and thereafter the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed so that an uncalcined concrete is obtained. In another embodiment, the inorganic particles and the inorganic microparticles are mixed in an amount as described above, and then mixed with the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica, the coagulation regulating agent, and the active silica are added and the components are mixed so as to obtain an uncalcined concrete. In another embodiment, the inorganic particles are mixed with the inorganic microparticles in a proportion as described above, and then with the aluminum and oxygen compound and the coagulation aid in a uniform manner; and thereafter, the nanocolloidal silica, the coagulation regulating agent, and the active silica are added and the components are mixed so as to obtain an uncalcined concrete. In another specific embodiment,

the inorganic particles are mixed with the inorganic microparticles in a proportion as described above, and then with the water reducing agent and the aluminum and oxygen compound uniformly; and thereafter, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed so as to obtain an uncalcined concrete. As a variant, in the abovementioned embodiments, the components other than nanocolloidal silica, the coagulation regulating agent and the active silica (if it is present) are firstly uniformly mixed, and then nanocolloidal silica, the coagulation control agent and active silica (if present) are added and the components are mixed to prepare an uncalcined concrete. Alternatively, in the aforementioned aspects, the components in the form of a solid are first mixed, and then the components in the form of a liquid (for example, a solution, a suspension, and a sol) are added and the components are mixed to prepare an uncalcined concrete.

The aggregate for the preparation of concrete can include terrestrial sandstone, silica sand, river sand, sea sand, silt, and so on. In one embodiment, the inorganic particles of the present invention are also considered as an aggregate. In a preferred embodiment, the aggregate is treated by removing salts (including removing cations and / or anions) before use.

The non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention has physical and mechanical properties comparable to, or even better than, that of a conventional concrete prepared with a conventional Portland cement. . For example, in one embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention exhibits a mechanically acceptable resistance to compression in a deformation and stress test according to the CNS standard. 1010 (ASTM C109) or CNS 1232 (ASTM C39), for example, a 28-day compressive strength of at least 12.4 MPa, at least 13.8 MPa, preferably at least 20.7 MPa, preferably at least 31.1 MPa, and more preferably at least 41.4 MPa. In a more preferred embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention has a compressive strength over 28 days of at least 55.2 MPa, at least 69 MPa, at least 82.8 MPa or at least 96.6 MPa. In one embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention exhibits a mechanically acceptable flexural strength in a flexural strength test according to standard CNS 1238 ( ASTM C348), for example, a 28-day flexural strength of at least 1.4 MPa, preferably at least 2.1 MPa, preferably at least 3.1 MPa, and more preferably d '' at least 4.2 MPa. In one embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention has a mechanically acceptable tensile strength by splitting in a splitting tensile test according to the CNS 3801 (ASTM C496), for example, a 28-day splitting tensile strength of at least 1.4 MPa, preferably at least 2.1 MPa, preferably at least 3.1 MPa, and better still at least 4.2 MPa. In a specific embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention exhibits a mechanically acceptable linear shrinkage in a test of resistance to linear shrinkage according to standard CNS 14603 (ASTM Cl57), for example, a linear withdrawal over 28 days of at most 1,500 μ, preferably at most 1,200 μ, better still at most 600 μ, better still at most 400 μ, and better still at most 200 μ.

In one embodiment, the non-calcined concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention has a mechanically acceptable compressive strength in a compressive strength test of a cylindrical concrete specimen according to CNS 1232 (ASTM C39), for example, a compressive strength of at least 31.1 MPa, preferably at least 34.5 MPa, and more preferably at least 41 , 4 MPa.

The following examples are presented in order to make the present invention more understandable to people with ordinary knowledge of the technique to which the present invention relates, but are not intended to limit the scope of the invention.

Examples

Example 1 A non-calcined cementitious composition having the components presented in Table 1 below is prepared.

Table 1: Non-calcined cement composition (parts by weight)

\ Raw material No. \ Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation / content control agent Active silica / content 1.6 pm 10 pm 50 pm 1A - - SiO ₂ 27.8 - AI ₂ O ₃ 8.8 12.1 Citric acid 2.2 - 2A - SiO ₂ 27.8 - - AI ₂ O ₃ 8.8 12.1 Citric acid 2.2 - 3A SiO ₂ 27.8 - - - AI ₂ O ₃ 8.8 12.1 Citric acid 2.2 - 4A - - SiO ₂ 27.8 - AI (OH) ₃ 8.8 12.1 Citric acid 2.2 - 5A - SiO ₂ 27.8 - - AI (OH) ₃ 8.8 12.1 Citric acid 2.2 - 6A SiO ₂ 27.8 - - - AI (OH) ₃ 8.8 12.1 Citric acid 2.2 - 7A - - SiO ₂ 28.1 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 8A - SiO ₂ 28.1 - MgO 2.2 Aluminous cement / 5.6 12.2 Citric acid / 2.2 - 9A SiO ₂ 28.1 - - MgO 2.2 Aluminous cement / 5.6 12.2 Citric acid / 2.2 - 10A - SiO ₂ 18.3 SiO ₂ 9.8 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 -

\ First material No. Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation / content control agent Active silica / content 1.6 pm 10 pm 50 pm 11A SiO ₂ 18.3 - SiO ₂ 9.8 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 12A SiO ₂ 18.3 SiO ₂ 9.8 - MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 13A SiO ₂ 11.1 SiO ₂ 11.1 SiO ₂ 5.9 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 14A - - SiO ₂ 27.2 MgO 2.2 AI ₂ O3 8.6 11.8 Citric acid 2.2 - 15A - SiO ₂ 27.2 - MgO 2.2 ai ₂ o ₃ 8.6 11.8 Citric acid 2.2 - 16A SiO ₂ 27.2 - - MgO 2.2 AI ₂ O ₃ 8.6 11.8 Citric acid 2.2 - 17A - - SiO ₂ 27.2 MgO 2.2 AI (OH) 3 8.6 11.8 Citric acid 2.2 - 18A - SiO ₂ 27.2 - MgO 2.2 AI (OH) s 8.6 11.8 Citric acid 2.2 - 19A SiO ₂ 27.2 - - MgO 2.2 AI (OH) 3 8.6 11.8 Citric acid 2.2 - 20A SiO ₂ 11.0 SiO ₂ 11.0 SiO ₂ 5.8 MgO 2.2 Aluminous cement / AI (OH) 3 5.5 / 1.4 12.1 Citric acid 2.2 - 21A SiO ₂ 18.1 - SiO ₂ 9.7 - AI ₂ O ₃ 8.8 12.1 Citric acid 2.2 - 22A SiO ₂ 18.1 - SiO ₂ 9.7 - AI (OH) ₃ 8.8 12.1 Citric acid 2.2 - 23A SiO ₂ 10.7 SiO ₂ 10.7 SiO ₂ 5.7 MgO 2.1 Aluminous cement / AI (OH) 3 5.4 / 3.6 11.8 Citric acid 2.1 - 24A SiO ₂ 10.8 SiO ₂ 10.8 SiO ₂ 5.7 MgO 2.2 Aluminous cement / AI (OH) 3 5.4 / 2.7 11.9 Citric acid 2.2 - 25A SiO ₂ 10.6 SiO ₂ 10.6 SiO ₂ 5.6 MgO 2.1 Aluminous cement / AI (OH) 3 5.3 / 4.4 11.7 Citric acid 2.1 -

Raw material N ° Xv Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation / content control agent Active silica / content 1.6 pm 10 pm 50 pm 26A S1O2 11.0 S1O2 10.0 S1O2 5.8 MgO 2.2 Aluminous cement / AI (OH) ₃ 5.5 / 2.2 12.1 Citric acid 2.2 - 27A - S1O2 28.1 - MgO 2.2 Aluminous cement 5.6 12.2 Tartaric acid 2.2 - 28A S1O2 11.1 S1O2 11.1 S1O2 5.9 MgO 2.2 Aluminous cement 5.6 7 nm (solid content 20%) 12.2 Citric acid 2.2 - 29A Sio ₂ 11.1 Sio ₂ 11.1 S1O2 5.9 MgO 2.2 Aluminous cement 5.6 18 nm (solid content 40%) 12.2 Citric acid 2.2 - 30A Sio ₂ 11.1 Si02 11.1 S1O2 5.9 MgO 2.2 Aluminous cement 5.6 11 nm (solid content 30 %) 12.2 Citric acid 2.2 - 31A Si02 11.1 Sio ₂ 11.1 S1O2 5.9 MgCO3 2.6 Aluminous cement 5.6 11.9 Citric acid 2.6 - 32A Sio ₂ 11.1 Si02 11.1 S1O2 5.9 CaCO3 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 33A Sio ₂ 17.7 - S1O2 9.5 MgO 2.2 Al2O3 8.6 11.8 Citric acid 2.2 - 34A SiO ₂ 17.7 - S1O2 9.5 MgO 2.2 AI (OH) 3 8.6 11.8 Citric acid 2.2 - 35A S1O2 8.1 Si02 12.0 SiO ₂ 6.3 - Aluminous cement 6.1 12.2 Citric acid 1.8 - 36A S1O2 11.0 SiO ₂ 10.0 S1O2 5.8 MgO 2.2 Al2O3 / AI (OH) 3 5.5 / 2.2 12.1 Citric acid 2.2 - 400A Sio ₂ 8.0 S1O2 11.8 S1O2 6.3 MgO 2.1 Aluminous cement 5.9 11.9 Citric acid 1.3 -

A. Subject matter No. \ Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation / content control agent Active silica / content 1.6 pm 10 pm 50 pm 41 OA SiO ₂ 8.0 SiO ₂ 11.7 SiO ₂ 6.2 MgO 2.1 Aluminous cement 5.9 11.9 Citric acid 1.8 15 pm/ 0.3 411A SiO ₂ 7.9 SiO ₂ 11.7 SiO ₂ 6.2 MgO 2.3 Aluminous cement 5.9 11.9 Citric acid 1.3 15 pm/ 0.5 412A SiO ₂ 7.9 SiO ₂ 11.6 SiO ₂ 6.2 MgO 2.3 Aluminous cement 5.8 11.8 Citric acid 1.9 15 pm/ 0.5 413A SiO ₂ 7.9 SiO ₂ 11.7 SiO ₂ 6.2 MgO 2.0 Aluminous cement 5.8 11.8 Citric acid 1.8 15 pm/ 0.5 414A SiO ₂ 7.8 SiO ₂ 11.6 SiO ₂ 6.1 MgO 2.3 Aluminous cement 5.8 11.7 Citric acid 1.8 15 pm/ 1.0 415A SiO ₂ 7.8 SiO ₂ 11.5 SiO ₂ 6.1 MgO 2.3 Aluminous cement 5.7 11.7 Citric acid 1.8 15 pm/ 2.0 416A SiO ₂ 8.0 SiO ₂ 11.8 SiO ₂ 6.2 MgO 1.8 Aluminous cement 5.9 11.9 Citric acid 1.3 5 ~ 8pm / 0.5 4001A Silicon carbide 18 pm 27.0 MgO 1.5 Aluminous cement 4.9 10.0 Citric acid 1.1 15 pm/ 0.4 501A River sand 11.1 River sand 11.1 River sand 5.9 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 502A River sand 19.4 - River sand 8.7 MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 503A River sand 19.4 River sand 8.7 - MgO 2.2 Aluminous cement 5.6 12.2 Citric acid 2.2 - 504A River sand 11.1 River sand 11.1 River sand 5.9 MgO 2.2 Aluminous cement 5.5 12.2 Citric acid 2.2 15 pm / 0.4 505A River sand 19.4 River sand 8.6 - MgO 2.2 Aluminous cement 5.5 12.2 Citric acid 2.2 15 pm / 0.4

\ Xoremière matter No. \ Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation / content control agent Active silica / content 1.6 pm 10 pm 50 pm 506A River sand 19.4 - River sand 8.6 MgO 2.2 Aluminous cement 5.5 12.2 Citric acid 2.2 15 pm / 0.4 60.1A SiO ₂ 7.9 SiO ₂ 11.7 SiO ₂ 6.2 MgO 2.3 Aluminous cement 5.9 11.9 Citric acid 1.3 15 pm / 0.5 C1A - - SiO ₂ (45pm) 27.7 MgO 2.2 - 12.7 Citric acid 1.1 - C2A SiO ₂ 8.0 SiO ₂ 11.8 SiO ₂ (45pm) 6.2 MgO 1.8 - 11.6 - -

Unless otherwise indicated, nanocolloidal silica is prepared by mixing 18 nm nanocolloidal silica and 80 nm nanocolloidal silica in a ratio of approximately 8/2 (solid content: 40% by weight).

Preparing a non-calcined cement composition having the components indicated in Table IA below.

Table ΙΑ: non-calcined cement composition (parts by weight)

\ Raw material No. \ Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica Coagulation / content control agent 1.6 μ m 10 pm 45 pm 80 nm 15 nm 10 nm 511A 0.3 6.0 8.4 512A 9.6 2.4 - 513A 7.2 4.8 - 514A SiO ₂ SiO ₂ SiO ₂ MgO Aluminous cement 4.8 7.2 - Citric acid 515A 2.4 9.6 - 8.0 11.8 6.2 1.8 5.9 1.3 516A - 12.0 - 517A - - 12.0 518A 9.6 - 2.4 519A 7.2 - 4.8

In Examples 2 to 9 which follow, the compressive strength is tested in accordance with standard CNS1010 (ASTM Cl09), with the exception of the duration of the strength test, which should be dominated by those listed in the current.

Example 2 An uncalcined concrete composition having the components indicated in the table below is prepared. The inorganic particles (aggregate) and the inorganic microparticles (S1O2) are mixed in accordance with the weight ratio shown in Table 2, then mixed uniformly with the aluminum and oxygen compound. Subsequently, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed, and the compressive strength is measured after 28 days of setting.

Table 2

\ Raw materials \ ^s No. \ Aggregate / content Particle size of inorganic microparticles (S1O2) / content Species of low aluminum and oxygen compound / content Nanocolloidal silica e Coagulation regulator species / content Resistance over 28 days (MPa) 1 Quartz sand x 49.1% 50 pm 27.8% Al2O3 8.8% 12.1% Citric acid 2.2% 16,20 2 Quartz sand x 49.1% 10 pm 27.8% Al2O3 8.8% 12.1% Citric acid 2.2% 14.65 3 Quartz sand x 49.1% 1.6 pm 27.8% Al2O3 8.8% 12.1% Citric acid 2.2% 17.67 4 Quartz sand x 49.1% 50 pm 27.8% AI (OH) ₃ 8.8% 12.1% Citric acid 2.2% 23,10 5 Quartz sand x 49.1% 10 pm 27.8% AI (OH) 3 8.8% 12.1% Citric acid 2.2% 21.51 6 Quartz sand x 49.1% 1.6 pm 27.8% AI (OH) 3 8.8% 12.1% Citric acid 2.2% 20.76 21 Quartz sand x 49.1% 1.6 pm 18.1% 50 pm 9.7% Al2O3 8.8% 12.1% Citric acid 2.2% 14.22 22 Quartz sand x 49.1% 1.6 pm 18.1% 50 pm 9.7% AI (OH) 3 8.8% 12.1% Citric acid 2.2% 17.53 35 Quartz sand x 53.6% 1.6 p m 8.1% 10 pm 12.0% 50 p m 6.3% Aluminous cement 6.1% 12.2% Citric acid 1.8% 31.23

Nanocolloidal silica is prepared by mixing nanocolloidal silica of nm and nanocolloidal silica of 80 nm in a ratio of about 8/2 (solid content: 40% by weight).

EXAMPLE 3 An uncalcined concrete composition having the components indicated in the table below is prepared. The inorganic particles (aggregate) and the inorganic microparticles (S1O2) are mixed according to the weight ratio presented in Table 3, and then mixed uniformly with the coagulation aid and the aluminum-based compound and d 'oxygen. Subsequently, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed, and the compressive strength is measured after 14 or 28 days of setting.

Table 3

\ Raw materials \ ^s No. \ Aggregate / content Particle size of inorganic microparticles (S1O2) / content Coagulation aid species / content Aluminum compound and oxygen species / content Nanocolloidal silica e Coagulation regulator species / content Resistance over 28 days (MPa) 7 Quartz sand x 49.7% 50 pm / 28.1% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 36.74 8 Quartz sand x 49.7% 10 pm / 28.1% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 42.54 9 Quartz sand x 49.7% 1.6 pm / 28.1% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 28.55 * 14 Quartz sand x 48.0% 50 pm / 27.2% MgO 2.2% Al2O3 8.6% 11.8% Citric acid 2.2% 24.27 15 Quartz sand x 48.0% 1ffpm / 27.2% MgO_ 2.2% Al2O3 8.6% 11.8% Citric acid 2.2% 21.41 16 Quartz sand x 48.0% 1.6 pm / 27.2% MgO 2.2% Al2O3 8.6% 11.8% Citric acid 2.2% 26.66 17 Quartz sand x 48.0% 50 pm / 27.2% MgO 2.2% AI (OH) ₃ 8.6% 11.8% Citric acid 2.2% 30.50 18 Quartz sand x 48.0% 10 pm / 27.2% MgO 2.2% AI (OH) 3 8.6% 11.8% Citric acid 2.2% 29.80 19 Quartz sand x 48.0% 1.6 pm / 27.2% MgO 2.2% AI (OH) 3 8.6% 11.8% Citric acid 2.2% 28.61 27 Quartz sand x 49.7% 10 pm / 28.1% MgO 2.2% Aluminous cement 5.6% 12.2% Tartaric acid 2.2% 40.99

The nanocolloidal silica is prepared by mixing 18 nm nanocolloidal silica and 80 nm nanocolloidal silica in a ratio of approximately 8/2 (solid content: 40% by weight).

* The resistance of N ° 9 is a resistance over 14 days.

Example 4 An uncalcined concrete composition having the components indicated in the table below is prepared. The inorganic microparticles (SiO2) are produced in the form of calibrated powders by mixing in accordance with the particle sizes and percentages by weight presented in Table 4. The inorganic particles (aggregate) are mixed with the calibrated powder, and then with the coagulation aid. and the aluminum and oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed, and the compressive strength is measured after 28 days of setting.

Table 4

\ Raw materials \ ^s No. \ Aggregate / content Inorganic microparticles Coagulation aid / content Compound based on cTaluminiu m and oxygen / content Granulometry of nanocolloidal silica / (solid content) / content Coagulation Regulatory Agent Resistance over 28 days SiO ₂ (1.6 pm) SiO ₂ (10 pm) SiO ₂ (50 pm) 10 Quartz sand x 49.7% - 18.3% 9.8% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 43.85 11 Quartz sand x 49.7% 18.3% - 9.8% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 46.31 12 Quartz sand x 49.7% 18.3% 9.8% - MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 47,04 13 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 56.81 28 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.6% 7 nm (20%) 12.2% Citric acid 2.2% 31.74

29 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.6% 18nm (40%) 12.2% Citric acid 2.2% 39.29 30 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.6% 11 nm (30%) 12.2% Citric acid 2.2% 37,05 31 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgCO3 2.1% Aluminous cement 5.6% 11.9% Citric acid 2.6% 31,03 32 Quartz sand x 49.7% 11.1% 11.1% 5.9% CaCO3 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 34.48

With the exception of Nos. 28 to 30, nanocolloidal silica is prepared by mixing 18 nm nanocolloidal silica and 80 nm nanocolloidal silica in a ratio of approximately 8/2 (solid content: 40% in weight).

Example 5 A non-calcined concrete composition having the components indicated in the table below is prepared. The inorganic microparticles (SiO2) are produced in the form of calibrated powders by mixing in accordance with the particle sizes and 10 percentages by weight presented in Table 5. The inorganic particles (aggregate) are mixed with the calibrated powder, and then with the coagulation aid. and the aluminum and oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation regulating agent are added and the components are mixed, and the resistance to compression is measured after 7 or 28 days of setting.

Table 5

'' Subject matters Ν “\ Aggregate / content Inorganic microparticles Coagu auxiliary content / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagulation regulator / content Resistance over 28 days (MPa) S1O2 (1.6 pm) S1O2 (10 pm) S1O2 (50 pm) 20 Quartz sand x 49.0% 11.0% 11.0% 5.8% MgO 2.2% Aluminous cement / AI (OH) s 5.5% / 1.4% 12.1% Citric acid 2.2% 78.21 * 23 Quartz sand x 10.7% 10.7% 5.7% MgO 2.1% Aluminous cement / AI (OH) 3 11.8% Citric acid 2.1% 87.84 *

47.9% 5.4% / 3.6% 24 Quartz sand x 48.3% 10.8% 10.8% 5.7% MgO 2.2% Aluminous cement / AI (OH) ₃ 5.4% / 2.7% 11.9% Citric acid 2.2% 89.19 * 25 Quartz sand x 47.5% 10.6% 10.6% 5.6% MgO 2.1% Aluminous cement / AI (OH) ₃ 5.3% / 4.4% 11.7% Citric acid 2.1% 100.76 * 26 Quartz sand x 49.0% 11.0% 11.0% 5.8% MgO 2.2% Aluminous cement / AI (OH) 3 5.5% / 2.2% 12.1% Citric acid 2.2% 35.58 ** 36 Quartz sand x 49.0% 11.0% 11.0% 5.8% MgO 2.2% Al2O3 / AI (OH) s 5.5% / 2.2% 12.1% Citric acid 2.2% 24.34

Nanocolloidal silica is prepared by mixing 18 nm nanocolloidal silica and 80 nm nanocolloidal silica in a ratio of approximately 8/2 (solid content: 40% by weight).

* The resistance of N ° 20 and 23 to 25 is a resistance over 2 days at 180 ° C.

** The resistance of N ° 26 is a resistance over 7 days.

Example 6 An uncalcined concrete composition having the components 10 indicated in the table below is prepared. The inorganic microparticles (SiO2) are produced in the form of calibrated powders by mixing in accordance with the particle sizes and percentages by weight presented in Table 6. The inorganic particles (aggregate) are mixed with the calibrated powder, and then with the coagulation aid and the aluminum and oxygen compound uniformly. Subsequently, the nanocolloidal silica and the coagulation regulating agent (citric acid) are added and the components are mixed, and the resistance to compression is measured after 10 or 28 days of setting.

Table 6

Raw materials \ ^s No. \ Aggregate / content Inorganic microparticles Coagu auxiliary content / content Compound based on aluminum and oxygen / content Nanocolloidal silica e / content Coagu Regulatory Agent content / content Active silica / content Resistance over 28 days (MPa) SiO ₂ (1.6 pm) S1O2 (10 pm) SiO ₂ (45 pm) 400 Quartz sand x 53.0% 8.0% 11.8% 6.3% MgO 2.1% Aluminum cement x 5.9% 11.9% CitFic acid 1.3% 44.54 (dip θ) 57.35 410 Quartz sand x 53.0% 8.0% 11.7% 6.2% MgO 2.1% Aluminum cement x 5.9% 11.9% Citric acid 1.8% 15 pm / 0.3% 61.41 411 Quartz sand x 52.6% 7.9% 11.7% 6.2% MgO 2.3% Aluminum cement x 5.9% 11.9% Citric acid 1.3% 15 pm / 0.5% 66.86 (soaking) 86.67 412 Quartz sand x 52.2% 7.9% 11.6% 6.2% MgO 2.3% Aluminum cement x 5.8% 11.8% Citric acid 1.9% 15 pm / 0.5% 65.64 413 Quartz sand x 52.3% 7.9% 11.7% 6.2% MgO 2.0% Aluminum cement x 5.8% 11.8% Citric acid 1.8% 15 pm / 0.5% 58.22 414 Quartz sand x 51.9% 7.8% 11.6% 6.1% MgO 2.3% Aluminum cement x 5.8% 11.7% Citric acid 1.8% 15 pm / 1.0% 53.48 * '415 Quartz sand x 51.4% 7.8% 11.5% 6.1% MgO 2.3% Aluminum cement x 5.7% 11.7% Citric acid 1.8% 15 pm / 2.0% 38.83 * 416 Quartz sand x 52.8% 8.0% 11.8% 6.2% MgO 1.8% Aluminum cement x5.9% 11.9% Citric acid 1.3% 5 ~ 8 p ml 0.5% 59.18 4001 Silicon carbide 0.7 nm 54.9% Silicon carbide 6 pm 27.0% MgO 1.5% Aluminum cement x 4.9% 10.0% Citric acid 1.1% 15 pm / 0.4% 62.17

Nanocolloidal silica is prepared by mixing nanocolloidal silica of nm and nanocolloidal silica of 80 nm in a ratio of approximately 8/2 (solid content: 40% by weight).

* The resistance of N ° 414 and 415 is resistance over 10 days.

EXAMPLE 7 An uncalcined concrete composition having the components indicated in the table below is prepared. River sand is first reduced to powder, it is sized, then it is used as inorganic microparticles, with which calibrated powders are formed by mixing in accordance with the 5 particle sizes and weight percentages presented in Table 7 The inorganic particles (aggregate) are mixed with the calibrated powder, and then with the coagulation aid and the compound based on aluminum and oxygen (aluminous cement) in a uniform manner. Subsequently, the nanocolloidal silica and the coagulation regulating agent (citric acid) are added and the components are mixed, and the compressive strength is measured after 28 days of setting.

Table 7

Raw materials \ ^s No. \ Aggregate / content Inorganic microparticles Coagu auxiliary content / content Aluminum and oxygen compound / content Nanocolloidal silica / content Coagu Regulatory Agent content / content Active silica / content Resistance over 28 days (MPa) SiO ₂ (1.6 pm) SIÛ2 (10 pm) SiO ₂ (50 pm) 501 Quartz sand x 49.7% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 46.20 502 Quartz sand x 49.7% 19.4% 8.7% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 35.85 503 Quartz sand x 49.7% 19.4% 8.7% MgO 2.2% Aluminous cement 5.6% 12.2% Citric acid 2.2% 33.10 504 Quartz sand x 49.5% 11.1% 11.1% 5.9% MgO 2.2% Aluminous cement 5.5% 12.2% Citric acid 2.2% 15 pm / 0.4% 41.37 505 Quartz sand x 49.5% 19.4% 8.6% MgO 2.2% Aluminous cement 5.5% 12.2% Citric acid 2.2% 15 pm / 0.4% 30.68 506 Quartz sand x 49.5% 19.4% 8.6% MgO 2.2% Aluminous cement 5.5% 12.2% Citric acid 2.2% 15 pm / 0.4% 31.72

Nanocolloidal silica is prepared by mixing nanocolloidal silica

18 nm and 80 nm nanocolloidal silica in a ratio of about 8/2 (solid content: 40% by weight).

It can be seen from the test results that easily accessible river sand is also useful in the present invention.

EXAMPLE 8 A concrete composition without calcium is prepared with 52.8% by weight of quartz sand, 8.0% by weight of S1O2 of 1.6 pm, 11.8% by weight of S1O2 of 10 pm, 6.2% by weight of 45 μm S1O2, 5.9% by weight of aluminous cement, 1.8% by weight of magnesium oxide, 1.3% by weight of citric acid, and the nanocolloidal silica having different particle sizes in combination, presented in Table 8. The inorganic microparticles (S1O2) are produced by mixing in the form of calibrated powders. Next, the inorganic particles (aggregate) are mixed with the calibrated powders, and then with the coagulation aid (magnesium oxide) and the aluminum and oxygen compound (aluminous cement) uniformly. Subsequently, add the nanocolloidal silica (a single component or a combination of several components) and the coagulation regulating agent (citric acid) and mix the components, and measure the compressive strength after 28 days of setting .

Table 8

contents Silica Silica Silica Resistance first nanocolloïdale nanocolloïdale nanocolloïdale over 28 days No. (80 nm) (15 nm) (10 nm) (MPa) 511 0.3% 6.0% 8.4% 75.85 512 9.6% 2.4% - 56.09 513 7.2% 4.8% - 73.42 514 4.8% 7.2% - 86.58 515 2.4% 9.6% - 66.61 516 - 12.0% - 68.32 517 - - 12.0% 59.81 518 9.6% - 2.4% 64.51 519 7.2% - 4.8% 66.12

Example 9 A concrete composition having the components indicated in the table below is prepared. The aggregate and the inorganic microparticles (S1O2) are mixed according to the weight percentages presented in Table 9, and then mixed with the coagulation aid. Subsequently, the nanocolloidal silica and the coagulation regulating agent (citric acid) are added and the components are mixed, and the compressive strength is measured after 28 days of setting.

Table 9

\ Raw materials \ ^s No. \ Aggregate / content Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica particle size e (Solid content) / content Coagulation / content control agent Resistance over 28 days (MPa) S1O2 (45 pm) C1 Quartz sand x 56.3% 27.7% MgO 2.2% No 7 nm (20%) 12.7% Citric acid 1.1% <13.8

Example 10 A concrete composition having the components indicated in Table 10 below is prepared.

Table 10

\ Raw materials \ ^s No. \ Aggregate / content Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica e (Solid content) / content Coagulation / content control agent S1O2 (1.6 pm) SiO ₂ (10 pm) SiO ₂ (45 pm) C2 Quartz sand x 60.3% 8.0% 11.8% 6.2% MgO 1.8% - 18/80 nm (40%) 9.5% / 2.4% -

The composition solidifies in a very short time, which goes against the application.

Example 11 A concrete is prepared with a non-calcined cementitious composition and a crude aggregate indicated in Table 11 below.

Table 11

[Raw materials N ° \ Gross aggregate Inorganic microparticles Coagulation aid / content Aluminum and oxygen compound / content Nanocolloidal silica (solid content) / content Coagulation / content control agent Active silica / content SiO ₂ 1.6 pm SiO ₂ 10 pm SiO ₂ 45 pm 601 Gravel 52.3% 7.9% 11.7% 6.2% MgO 2.3% Aluminous cement 5.9% 18/80 nm (40%) 9.5% / 2.4% Citric acid 1.3% 15 pm / 0.5%

The components are mixed and poured into a mold in order to prepare multiple concrete samples, which are kept for 28 days and which are then tested for compressive strength on cylindrical concrete test pieces in accordance with the CNS 1232 standard (ASTM C39). The compressive strength is presented in Table 12 below.

Table 12

No. Compressive strength (MPa) Average (MPa) IOC 47.76 45,02 C02 41.38 C03 45,80

Example 12 The flexural strength of the concrete samples prepared in Example 11 is measured in a flexural strength test of cylindrical concrete test pieces in accordance with standard CNS 1238 (ASTM C348). The flexural strength is presented in Table 13 below.

Table 13

No. Flexural strength (MPa) Average (MPa) B01 4,745 4,384 B02 3,962

EXAMPLE 13 The tensile strength by splitting of the concrete samples prepared in Example 11 is measured in a tensile strength test by splitting of cylindrical concrete test pieces in accordance with standard CNS 3801 (ASTM C496). . The tensile strength by splitting is presented in Table 14 below.

Table 14

No. Tensile strength by splitting (MPa) Average (MPa) YOU 3,677 3,265 T02 3,354 T03 2,628

It can be seen from Examples 11 to 13 that the concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention has good physical and mechanical properties.

EXAMPLE 14 The linear shrinkage of the concrete sample (SOI) prepared in Example 11 and of the concrete sample (ROI) prepared with commercial Portland cement and an aggregate are measured in accordance with the CNS standard. 14603 (ASTM Cl57). The linear shrinkage (μ) is presented in Table 15 below.

Table 15

No. Day 1 Day 3 Day 5 Day 7 Day 28 KING 147 252 312 399 503 SOI 52 120 132 176 176

It can be seen from the test results that the concrete prepared with the non-calcined cement composition or the non-calcined concrete composition of the present invention is much better than the concrete prepared with conventional Portland cement in terms of shrinkage linear.

The embodiments of the present invention described above are intended to be illustrative only. Many alternative embodiments can be devised by those skilled in the art without departing from the scope of the claims which follow.

Claims (14)

1. Composition including: (a) inorganic microparticles having a particle size in the range from 1.0 to 100 μm in an amount of approximately 31% to 87% relative to the total weight of the composition; (b) a compound based on aluminum and oxygen; (c) a nanocolloidal silica, and (d) a coagulation regulating agent. 2. Composition according to claim 1, in which the particle size distribution of the inorganic microparticles is at least bimodal. 3. Composition according to claim 1, in which the inorganic microparticles have a trimodal particle size distribution, in which the particles having a maximum particle size or particle size range count, independently of each other, for at least 20% to 50% by weight. total of inorganic microparticles. 4. Composition according to claim 1, in which the nanocolloidal silica has a bimodal particle size distribution, in which the particles having a maximum particle size or particle size range count, independently of each other, for at least 30% to 70% by weight. total nanocolloidal silica. 5. Composition according to claim 1, further comprising at least one of a coagulation aid, active silica, and a water reducing agent. 6. Composition including: (a) inorganic particles in an amount of about 66% to 92% relative to the total weight of the composition; (b) a compound based on aluminum and oxygen; (c) nanocolloidal silica, and (d) a coagulation regulating agent, in which the inorganic particles include inorganic microparticles having a particle size in the range of 1.0 to 100 qm, and the inorganic microparticles account for 25% to 45% of the total weight of the inorganic particles. 7. Composition according to claim 6, in which the particle size distribution of the inorganic microparticles is at least bimodal. 8. Composition according to claim 6, in which the inorganic microparticles have a trimodal particle size distribution, in which the particles having a maximum particle size or particle size range count, independently of one another, for at least 20% to 50% by weight. total of inorganic microparticles. 9. Composition according to claim 6, in which the nanocolloidal silica has a bimodal particle size distribution, in which the particles having a particle size or a maximum particle size range count, independently of each other, for at least 30% to 70% by weight. total nanocolloidal silica. 10. Composition according to claim 6, further comprising at least one of a coagulation aid, active silica, and a water reducing agent. 11. Composition including: (a) inorganic microparticles having a particle size in the range from 1.0 to 100 μm at a rate of approximately 30% to 86% relative to the total weight of the composition; (b) a compound based on aluminum and oxygen; (c) nanocolloidal silica; (d) a coagulation regulating agent; and (i) a coagulation aid, comprising an oxide, hydroxide, sulphate or carbonate of an alkali metal or of an alkaline earth metal. 12. Composition including: (a) inorganic particles in an amount of approximately 65% to 90% relative to the total weight of the composition; (b) a compound based on aluminum and oxygen; (c) nanocolloidal silica; (d) a coagulation regulating agent; and (i) a coagulation aid, comprising an oxide, hydroxide, sulphate or carbonate of an alkali metal or of an alkaline earth metal, in which the inorganic particles comprise inorganic microparticles having a particle size in the range from 1.0 to 100 µm, and the inorganic microparticles account for 25% to 45% of the total weight of the inorganic particles. 13. Concrete comprising a composition according to any one of claims 1 to 12. 14. Concrete according to claim 13, having at least one of the following characteristics: a compressive strength over 28 days of at least 12.4 MPa as measured in accordance with standard CNS 1010 (ASTM Cl09) or the standard CNS 1232 (ASTM C39), a flexural strength over 28 days of at least 1.4 MPa as measured in accordance with standard CNS 1238 (ASTM C348), a tensile strength by splitting of at least 1, 4 MPa as measured in accordance with standard CNS 3801 (ASTM C496), and a linear shrinkage over 28 days of 1,500 μm at most as measured in accordance with standard CNS 14603 (ASTM C157).