KR810001629B1 - Hydraulic cement composition - Google Patents

Abstract

Concrete compressive strength is increased by 0.01-0.1(preferably 0.01-0.05) wt.% Cerationia siliqua pods or beans. The additive may be used in raw, roasted, or extd. from or in combinations thereof. with carob flour(in wt. %) and amt. of water(in kg/m3) the 7 and 28 day compressive strengths(Mpa) of 4 mixes were: 0.01, 177.3, 23.08 and 33.55; 0.025, 177.3, 24.12 and 33.38; 0.05, 176.7,. 24.12 and 34.55; 0.10, 176.1, 25.60 and 36.00. Setting times of the 3rd and 4th mix. were slightly retarded. The additives can be used in combination with known admixts. and setting accelerators.

Description

Hydrosetting Cement Composition

The present invention relates to a hydraulic cement composition. More specifically, the present invention relates to an additive mixture known as an additive for mixing hydraulic cement mixtures such as hydraulic cement concrete, mortars, grouts, pure cement mixtures and dry concrete for manufacturing concrete, mortar and grout. It is about.

Among them, mixtures are used to reduce the moisture content, increase the compressive strength, and delay the hardening and solidification rate of the cement mixture.

Often, reducing the amount of water in the hydraulic cement mixture results in greater compressive strength, thus achieving both reduced water content and increased compressive strength.

The mixture as described above as a retarder delays chemical hydration reactions and allows the concrete to remain flexible without prolonging solidification for longer periods of time than concrete without the use of a retardant. Commonly used to reduce moisture content and increase compressive strength, and also act as a coagulation retardant, ligrosulfate, such as calcium lignosulfonate, salts of hydroxycarboxylic acid, glucose ( Sugars such as dextrose, maltose, sucrose, fructoese, and the like, and highly polymerized polysaccharides such as dextrins. For example, retardation of solidification as a coagulation retardant to delay the solidification of cement during difficult construction, which requires the concrete to remain flexible for longer than normal processing periods or to overcome undesirable coagulation acceleration in hot climates. It is useful to use mixtures with If the coagulation retardant can also increase the compressive strength, the increased compressive strength is a supplementary advantage.

If the mixture does not achieve sufficient or significant improvement in compressive strength or does not achieve other necessary or desirable effects and does not achieve the desired delay, or overcomes the inefficiency To this end, additives or mixtures are often used in combination. Excess retardants, which are well known as accelerators for increasing the rate of hydration to achieve early strength, such as calcium chloride and triethanol amine, are often used to overcome, aid or expand these undesirable or lacking effects. Thus, mixtures which can be used in combination with other mixtures are also preferred. It is already known to those skilled in the art that products and carbohydrates extracted from some plants become beneficial concretes or mortars when used as small percentage additives to flexible mixtures. Among them, molasses extracted from sugar cane or sugar beet belongs to the category of monosaccharides. For example, US Pat. No. 2,311,290 describes the use of blackstrap molasses in amounts of 0.01-0.1% by weight of concrete. U. S. Patent No. 3,432, 316 describes mixtures useful for cement and concrete mixtures based on the use of plant extracts, ie, water soluble extracts and parts of tobacco plants such as ground and heat treated tobacco plants. This resulted in the discovery of the mixture which beneficially increases the compressive strength of the cured cement mixture.

Other materials known in the art for increasing the strength of concrete and mortars include high polymer polysaccharides such as dextrins. Polysaccharides delay the cement hydration more severely than monosaccharides, but they can be used without the risk of completely or severely inhibiting hydration and curing.

U. S. Patent No. 3,432, 317 describes the use of saccharide polymers composed of glucose units with glucose units on the order of 3 to 25 as a cement mixture. Glucosaccharides are described as more beneficial than high polymerization polysaccharides and high depolymerization products. On the other hand, mixtures as described in US Pat. No. 3,432,317 can be suitably used as a means to increase the compressive strength in cement, concrete and mortar, and the potential insolubility of the materials for preparing such mixtures is to provide for selective mixtures. This gives the corresponding desired result.

The problem of insolubility is used in other known additives and mixtures. Increasing demand makes the mixture insoluble. For example, lignosulphate may not be ubiquitous because suppliers are pressured by environmental constraints that make it difficult for suppliers to purchase these materials through their own cooperative channels. In addition, sugars and dextrins are very expensive as speculative flocks and fancy products and are often unavailable.

Increasing costs and insolubility of energy have also led to the discovery of additives and mixtures that minimize or reduce the amount of energy needed to produce optional additives and / or mixtures.

Thus, new and optional additives or mixtures which can be used in combination with hydraulic cement mixtures, improve compressive strength or control the rate of cure of the resulting cement product, while not adversely affecting the hydraulic mixtures, need.

The present invention further improves on additives or mixtures for combining with hydraulic cement mixtures such as concrete, mortar and grout, pure cement mixtures nonplastic cement mixtures, and dry mixtures used to prepare the aforementioned concrete, mortars and grouts. It relates to a method of bonding the cement mixture additives.

It is characterized in that the whole pods of Carob tree or Serratonia silicaewa are used without roasting as an additive, and the chemical composition of Carob tree pod is the same as Locust Bean Gum and albumin, globulin (globulins), prolamins, glutelines and carboxylates such as sugar, sucrose, dextrin, penroic acid, ash, fat, crude fiber, moistre ) And the like. The effects of each component are not explained individually.

As used herein, the term “hydrosetting cement” refers to hardening by hardening by the action of water, such as protland cements, sulfate-resistant cement, blastfurnace cement, pozzolanic cement and glualumina cement. It means any cement composition that can be used, and the additives or mixtures according to the invention can be mixed with the hydraulic cement mixture. The additives or mixtures of the present invention are suitable for use in portland cement mixtures. In addition, the term “pootland cement” herein refers to any cement composition having a high content of tricalcium silicate, ie, a portland cement or a cement that is chemically similar to the portland cement. 150-74. This means a flyash produced in steam or a power generator, a pozzolana slag produced from a blast or a mixture of these mixtures to form a polandland cement.

The invention broadly encompasses the use of the fruit of the Carob tree, Ceratonia Siliqua, as an additive or mixture in a cement mixture, which additive is sufficient to increase the strength of the mixture upon curing. Used as The additives are suitably selected from the group consisting of raw or roasted carob pods or extracts of soybeans, pods or soybeans, or mixtures thereof, suitable amounts of between about 0.01-0.05% based on the weight of the cement and the weight of the cement Approximately 0.01-0.1% would be suitable, but up to 0.25% is indicated.

The use of additives increases the compressive strength of the product over similar mixtures made without additives, which is beneficial for the engineering of hydraulic cement mixtures. In addition, the use of this additive within the range of 0.01-0.1% does not adversely affect the solidification time of the hydrocurable mixture and actually causes a slight delay in the solidification time. Also, additives within the above range of addition amount are useful because the additives described as retarders achieve a high degree of retardation and, on the other hand, an improvement in the compressive strength of the cured mixture can be obtained.

It is therefore an object of the present invention to provide an improved hydraulic hardening cement mixture.

It is another object of the present invention to provide a hydraulic cement mixture, such as a potlandic or high alumina cement mixture, wherein the additives or addition mixtures increase the compressive strength of the mixture upon curing.

It is another object of the present invention to provide a hydraulic cement mixture, such as a potlandic or high alumina cement mixture, in which the additive or mixture advantageously delays the curing rate of the cement mixture.

It is a further object of the present invention to provide a method of increasing the strength of a cement mixture without adversely affecting the solidification time.

It is yet a further object of the present invention to provide a method of increasing the compressive strength of a hardened cementable cement mixture, such as portland cement, while effectively retarding the solidification and curing rates of the cement mixture.

These objects of the present invention will become apparent from the following description. Carob or locust, seratonia silico, are commercially grown in tropical America, Africa and the Mediterranean. Its fruit is tall, flat with pods, about 15.2-30.5 cm long and 2.5 cm wide, and consists of several seeds surrounded by sweet, fleshy edible flesh.

Fruits and / or seeds or legumes are variously known as carob, carob beans, carob-tree beans, St John's bread, algarroba, algarova beans and locust beans. It has also been found that soy extract is useful as an emulsifier.

Carob is made from Jacaranda Copaipia trees and should not be confused with Caroba or Carob wood, known as Jacaranda products. Also, the ocust should not be confused with a bicameral locust tree, Robinia Pseudoacacia, or North American Gleditsia Triacnthus bee acacia tree. In addition, Lalgaroba should not be confused with Prosopis Chilenseis.

Carob fruit is available in various forms, such as whole pods, raw pods and roasted pods, from which pods or beans are removed, or whole pods, roasted pods, pods without beans, raw beans or red beans, beans It can be used as a mixture of pods, or as crushed pods, which are generally about 0.3 cm thick, about 1.3-1.9 cm long, and 1.3-1.9 cm wide, already or dried or made from red carob fruit pods. It can be used as a finely ground carob powder in the form of a carob powder. The type, form or amount of carob fruit used is not important. It is therefore possible to use raw or red carob fruits or mixtures thereof with or without soybeans.

Raw pods are pods with or without seeds or beans, which are air dried and not otherwise treated. Analysis of the rough and unprocessed dried pods, which can be considered as typical pods, showed moisture contents between 14-16% by weight. While there are significant differences between the terms “roasted” or “roasted”, these generally refer to a method in which the beans are heated sufficiently for a sufficient amount of time to obtain the necessary characteristics to market the raw pods with or without soybeans. . Although the roasting step is not critical to the present invention, the roasted carob pod is a source of carob fruit since it is a commercially useful form. The exact roasting conditions will typically vary depending on the particular difference of each piece of fruit for commercial use and the desired quality of the fruit.

In the practice of the present invention, the fruit of Carob tree, Serratonia silicae can be used for the production of potland-type cement concrete and mortar, high alumina cement concrete, hydraulic cement mixtures such as mortar and grout, pure cement mixtures, non-flexible cement mixtures and The dry mixture needed to make the concrete, mortar and grout is coagulated and then mixed with the fruit of the carob tree described above in an amount sufficient to increase the compressive strength of the cured mixture. Broadly, the additive or mixture is combined with the cement mixture in an amount of up to about 0.25% by weight based on the weight of the cement, suitably between 0.01-0.1% by weight based on the weight of the cement mixture. In a secondary suitable range, the amount of electricity added will be in the range of about 0.01-0.05 weight based on the weight of the cement mixture.

The fruit of Carob tree, Serratonia silicica used in the cement mixture of the present invention may include the fruit itself, or an extract of the fruit, or a mixture thereof. In either case, the main effect of adding to the cement mixture is to increase the compressive strength in the cured mixture.

In addition, the additives or mixtures according to the invention are useful as retarders themselves, since they delay the cure rate of the cement mixture without adversely affecting the compressive strength of the cured mixture.

Extracts of Carob tree, Serratonia silicae fruit contain fruit parts which are soluble in the specific solvent used. Typically for convenience, the aforementioned solvent will be a water soluble system, and although the other solvents, such as alcohols, may be used, the desired effect as described above in a Portland cement mortar or a hydraulic cement mixture such as concrete or grout. It will be a water soluble system including alkaline, neutral and acidic water soluble systems that produce. On the other hand, it is clear that the chemical composition of the extract changes specifically depending on the extraction variable conditions, but these chemical components are complex enough to be completely difficult to analyze. As a result, the materials of the present invention can be best described in terms of the effects produced in concrete and mortar. Extracts of carob fruit may be prepared by stirring the carob fruit with water or acid, alkali or other solvents (usually aqueous solutions) and then filtering or removing the insoluble portion of the carp fruit from the resulting mixture.

The carob fruits to be extracted are preferably ground to increase their surface area and to increase the extraction efficiency, but similar extracts with similar properties should be obtained if the carob fruits are not completely ground. Similarly, milling the plant by drying it beforehand is suitable, but only preferred and not necessary for the present invention. Since dried raw carpfruit is commercially available, it is a convenient starting material for preparing extracts. Under the easiest extraction conditions, pieces of carpfruit can be simply mixed with water at room or ambient temperature in an open container.

Stir or stir to increase the contact affinity between the carob fruit and the solvent for extraction purposes. Under moderate extraction conditions, solvents such as caro and water or aqueous solutions are heated at the boiling point of the solvent and extraction can be carried out without damaging the liquid material by means of a convenient vessel equipped with a reflux cooler. More stringent extraction conditions using temperatures above 180 ° C. are preferred, for example, using a closed reactor, such as a pressurized cooker, to continuously stir and to use a mechanism for sensing pressure and temperature. When solvents other than neutral water are used in the extraction process, the preferred solvent volume is easy to obtain and economical acids such as sulfamic acid, sulfuric acid or nitric acid or alkalis which are easy and economical to obtain, for example It can obtain by adding sodium hydroxide previously. The concentration of these solvents can be used in a wide range, for example 1% by weight solution. The initial addition of carpfruit to the aqueous phase can be varied, but using a plant between 5-35% by weight relative to the liquid weight can facilitate the filtration of the required extract or the entire product without filtration. It is most easily mixed with the concrete mixture when used.

Whether the filtrate or the entire product is used in concrete, the concentration of solubles in the liquid will depend on the concentration of the initial slurry and the extraction temperature. Typically, between 50 and 90% by weight of soluble material will be formed in the liquid phase relative to the initial slurry of the plant based on the dry solids.

When using filtered extracts, it is convenient to add this solution as part of the regular mixed water required by the concrete so that no pre-evaporation or concentration is required. However, if the extract is concentrated to the desired degree before entering the concrete mixture, the same effect will be obtained by the same amount of use of the solute weight regardless of the volume or concentration of the extract.

When the solid carob fruit itself is used, it is suitable to mix it with the hydraulic cement mixture in addition to the mixed water used for mixing and condensing with the hydraulic cement. However, the additive may be added as part of the dry cement mixture or in other convenient ways.

The term “aggregate” includes both fine coagulum such as sand and coarse coagulum such as crushed stone or gravel.

In the case of mortars in general, sand or other fine coagulum is used which meets the requirements of ASTM Standard C-33 as a coagulant.

In the case of concrete in general, sand or other fine coagulum according to ASTM Standard C-33 may be used as a coagulant, crushed stone, gravel or other coarse coagulum. The exact size, purity, quality and quantity or range of fine or coarse aggregates will vary depending on the intended use and the properties of the mortar or concrete.

The most commonly used, although not limited to, is a size of fine condensation, which uses a wide range of sizes between about +4 meshes and -100 meshes, and between 7.6 cm and 4 meshes for coarse condensation. Use a range size. Coarse coagulums typically use mineral sources such as gravel or crushed rock, but in some cases they are partially graded metals such as iron slabs, slag or other coagulations. It is composed.

Also, in general, in the case of dry mortar mixtures, the addition rate of the fine coagulum added to the cement will be in the range of about 25-75% by weight based on the weight of the cement mixture, which is the property of the coagulant and the desired It depends on the constellation. In the case of dry concrete mixtures, fine and coarse coagulants will fall within a broad range between 20-80% and 5-60% by weight, based on the weight of the mixture, depending on the desired properties and use of the mixture. Will be.

For both mortar and cement, the amount of water generally used should be sufficient to effect hydraulic solidification of the cement present in the mixture and to provide a suitable working efficiency. This amount of water will be in the range of about 20-60% by weight of the cement in the mixture in the case of mortar and in the range of about 25-70% by weight of the cement in the mixture in the case of concrete. The exact amount of water used will depend on the end use of the cement mixture and the coagulants present in the mixture.

For the purpose of carrying out the beneficial results obtainable by practicing the present invention, a mixture of ordinary fruit mixtures, more specifically concrete mixtures, is prepared by combining the fruit of Carob tree, Seratonia silico with various kinds or forms and usages. Compare Cement of the same type and type was used in each mixture, and the proportion and type of coagulant used were substantially the same. Sufficient amount of water was added to each mixture to cause hydraulic solidification of the cement mixture, making the cement mixture essentially homogeneous. To illustrate the present invention more specifically, it was compared with US Pat. No. 3,432,317, which typically uses glucosaccharides, because saccharides are known as additives to increase strength.

The results shown in Table 1 illustrate the use of carpfruit in the form of carp powder in a type 1 Portland cement mixture to form concrete. Carob powder is a commercially useful, ground powder of ripe fruit pods of ceratonia silqua. The amount of cement in the mixture is nominally 5 U.S. sacks per cubic yard of concrete (US soak of cement is 42.7 kilograms), the ratio of fine particles to coagulant is 0.49. Have a slump between 8.3 and 9.5 cm. As can be seen from the above, the use of carob powder gives increased compressive strength over similar mixtures without additives. As the usage increases, the addition of the carob powder delays the time for solidifying the cement mixture slightly. Compared to the use of glucosaccharide additives, the carob powder mixture provides much higher compressive strength and much greater retardation compared to conventional concrete.

TABLE 1

Note) The coagulation promotion was indicated by a minus sign and the coagulation delay was indicated by a plus sign.

The results presented in Table II illustrate the different ranges and types of carob fruits and the upper limits of their use in type 1 Portland Cement Concrete Mixtures. The amount of cement in the mixture is nominally 5 U.S. sarks per 0.76 cubic meters of concrete, the ratio of fine coagulant to coagulant is 0.48 and the concentration of concrete is that they have a slump between 8.3-10.2 cm. In the mixture of Table II, the raw material has a thickness of about 0.3-0.6 cm, a width of 1.9 cm, a length of 1.9 cm, an average moisture content of 15.1%, essentially ballless, and commercially useful unprocessed carob ＂Crushed, unprocessed dry carob pod, or about 0.3 cm thick, 1.3 cm long and 1.3 cm wide, with an average moisture content of 11.5%, essentially soy-free, commercially useful Roasted carob chops, or crushed roasted carob pods.

TABLE 2

Note 1; Acceleration of coagulation is shown as negative (-), while delay in coagulation is shown as plus (+).

2; The cylinder was still soft on beans (about 6-8 hours) on the test day.

3; The cylinder was still soft after 24 hours and no compressive strength test was done.

4; Mixing was performed before extraction at room temperature and atmospheric pressure.

5; Extraction was performed at pressurized (14 psig) and elevated temperature (120 ° C.).

To test both raw and roasted carobs as additives, these carobs were tested in U.S. Pat. Part of the mixed water to the concrete mixture without grinding any more of the powder thus formed by passing through a 100 mesh sieve, i.e., the carob particles having a diameter of about 0.0059 inches (0.149 mm) or less. Was added to the concrete mixture as an aqueous slurry using. The grinding process is not critical to the present invention but is carried out to provide convenience in the rate of mixing and dispersing the carb in the cement mixture. Thus, the carob fruit may be added in whole or in milled form, ie in diameters of several inches to microns, suitably in diameter sizes of 0.25 cm-0.00025 cm.

Aqueous extracts were treated with specific solvent solutions (water, 1% by weight of sulfamic acid and 1% by weight of sodium hydroxide as solvent) 2ι and U.S. No., prepared by mixing 200 grams of raw or roasted chopped ground for convenience. After mixing for 1 hour, insoluble materials were filtered off. The aqueous extract was treated at room temperature and atmospheric pressure, and then calcined at a high temperature and pressure, that is, at 96.5 KPa gauge and at 120 ° C. under pressure. It is not limited to use 96.5 KPa gauge and 120 ° C as the high temperature and high pressure to be used. Pressurized cooking for the purpose of conducting these tests is done in ordinary pressurized cookers using cooking pots, but other devices may be used to achieve high temperatures and pressures. Sulfamic acid and sodium hydroxide extracts are treated under high temperature and high pressure conditions. The yields for the various extracts based on dry solids are shown in Table III below.

TABLE 3

TABLE III

As can be seen from the results shown in Table II, the use of a portion of the carob fruit, whether in the form of a pulverized phase or in the form of an extract, indicates that the compressive strength is increased over similar mixtures prepared without additives. The use of 0.25% by weight of carp has a high delay (approximately 6-8 hours longer than additive-free concrete mixtures), but the compressive strength of the hardened cement mixtures is measured on the 7th and 28th days. Brings advantages. In general, increasing the amount of carp used increases the compressive strength of the cured mixture correspondingly.

Although certain mixtures, for example mixture 104, are not generally inclined to accelerate the rate of cure, these results are believed to fall within the limits of experimental error. In the case where the amount of use of the karp exceeded 0.25 wt%, the delay effect was so large (more than 24 hours) that the cylinders (cxlinders) were discarded without performing the compressive strength test on the 7th and 28th days. Thus, the use amount of carob is preferably 0.25% by weight, and is still useful when greater than 0.25% is required for a large delay in curing rate. Also, based on the weight of the cement, within a suitable range between 0.01-0.1% by weight and 0.01-0.05% by weight, the compressive strength of the cement mixture can be increased without significantly increasing the amount of air contained in the mixture.

In addition, comparable results were obtained using carob fruit and seratonia silico, compared with the use example of glucosaccharide.

The results shown in Table IV illustrate the use of whole carob fruits known as promoters, namely pods and seeds and mixtures of carob fruits and triethanolamine. As shown in Table IV, this was compared with the case of using carob fruit and two known retarders, glucosaccharide and calcium lignosulfonate described in US Pat. No. 3,432,317.

The used carob fruit additives were prepared by tap water 2ι and 200 g of carob fruit (solids). number. An aqueous extract prepared by pulverizing (for convenience) through an 8 mesh sieve and mixing in a pressure cooking vessel for about 1 hour at a temperature of 120 ° C. and a pressure of 96.5 Kpa gauge.

TABLE 4

After the heat was removed, the pressure was released and the mixture was filtered and the residue was discarded. The yield was 70% based on dry solids. Carpfruit used as a starting material was dried whole raw fruits, including pods and seeds of Carob tree, Serratonia silliqua, and had a moisture content of 22% by weight. The aqueous mixture of whole Carpfruit was then used in a weighted type 1 Portland cement mixture to form concrete. Cement was the same as that shown in the test results shown in Tables 1 and II. The amount of cement in the mixture was nominally 5 sacks per 0.76 cubic concrete of concrete, the ratio of fine coagulant to coagulant was 0.48, and the concentration of concrete was found to be slumps ranging from 8.3 to 9.5 centimeters. slumps).

As can be seen from the results described in Table IV, the use of carpfruit as a mixture in concrete advantageously increases the compressive strength of the hardened concrete mixture, and also effectively improves the curing rate of the mixture compared to conventional cement mixtures. Delay. In addition, the use of carob fruit gives results comparable to known glucosaccharide and calcium lignosulfonate mixtures. In addition, no adverse effects occurred when the carobfruit mixture was used in admixture with a known promoter (triethanolamine).

To demonstrate the usefulness of carp in other hydraulic cements, raw carob pods, ie raw carob pods ground to 100 ± 1 mash, were tested in limited use in commercially available high alumina cement mixtures. The raw carob pod was simply selected as an example of the carop and used in amounts of 0.025% by weight and% by weight based on the weight of the cement. The high alumina cement used was “CEMENT FONDU”, which is typically 40% by weight of Al ₂ O ₃ , ₂ % by weight of TiO ₂ , 38% by weight of CaO, 11% by weight of Fe ₂ O ₃ , ₄ % by weight of FeO ₄ and SiO ₂ 5 Other high alumina cements may be used although they contain up to% by weight, such as LUMNITE and REFCON. The cement mixture contains a high alumina concrete mixture containing cement 5.1 / 2 sacs (42.7 kg per sac) per cubic yard of concrete, the ratio of fine coagulant to coagulant was 0.47 and the concentration of concrete was 8.9- It was a concentration with a slump of 9.5 centimeters. The results shown in Table V show compressive strength only on days 1 and 7 for convenience and show that the carp is useful in high alumina cements to increase the compressive strength of the cured cement mixture. The fact that it is a carob and retards the rate of hardening of the alumina cement mixture means that the carob fruit is a useful means as a retarder for the high alumina cement and the portland cement.

It is within the scope of the present invention to combine additives other than known additives generally used in cement mixtures prepared as described above. Other additives include air-introducing agents, air-releasing agents, pozolans, fly ashes, colorants, waterproofing agents, coagulation accelerators and the like. Carob fruits may also be used in combination with the cement additives described above to provide the desired changes in the physical properties of the cements to be prepared.

TABLE 5

Note 1) The promotion of coagulation is indicated by a minus sign, while the delay of coagulation is indicated by a plus sign.

It is also within the scope of the present invention to increase the compressive strength of the cured mixtures by using carob fruits with known coagulation retardants such as lignosulfonates, sugars, glucosaccharides or mixtures thereof.

Carob fruits and the known coagulation retarders described above can also be used with conventional coagulation accelerators as described above and have been demonstrated from the results in Table IV to achieve the desired effect.

On the other hand, while the present invention has been described with only suitable embodiments, it will be apparent to those skilled in the art that various modifications, changes and substitutions can be made without departing from the scope of the present invention. Therefore, it is intended that this invention be limited by the claims set forth below.

Claims (1)

As described above, in preparing a hydraulic cement mixture by mixing a sufficient amount of water, a coagulant, and an additive, which affects the hydration of the cement, the above-mentioned additives may be used as carob tree or seratonia silicica fruit. Characterized by containing up to 0.25% by weight, based on the weight of cement, an additive consisting of a water-soluble extract obtained by mixing its pod (natural or roasted pod) with an aqueous solution of a solvent selected from water, acid or base. Hydraulic cement composition.