CN104211342B - Colored ready-mixed mortar and production method thereof - Google Patents

Abstract

The invention relates to a colored ready-mixed mortar and a production method thereof, which is characterized in that: the composite material comprises the following raw materials in parts by weight: wherein, the artificial sand is 60 to 70 parts, the cement is 12 to 13 parts, the second-level fly ash is 10 to 12 parts, the inorganic pigment is 1 to 5 parts, and the additive is 0.1 to 0.5 part. The color ready-mixed mortar has excellent stain resistance, stability, mechanical property and ageing resistance, and has no efflorescence and color difference; and the concrete has good tensile bonding strength, compressive strength, impermeability, crack resistance, shrinkage reduction, water retention rate and other properties, and simultaneously has excellent construction performance such as excellent working performance, easy pumping, easy compaction and the like.

Description

Color ready-mixed mortar and production method thereof

technical field

The invention belongs to the processing field of ready-mixed mortar, and in particular relates to a colored ready-mixed mortar which has no efflorescence and color difference during use and has excellent stain resistance and a production method thereof.

Background technique

Mortar is one of the most widely used building materials in construction engineering, and it is widely used in masonry and plastering of buildings. In my country's current construction projects, more than 60% of buildings still use wall materials such as bricks and blocks, and the construction mortar used in masonry and plastering construction is still mainly cement mortar or mixed mortar.

With the technological progress of the construction industry and the improvement of civilized construction requirements, the on-site mixed mortar has increasingly shown its inherent defects, such as unstable mortar quality, large waste of materials, single type of mortar, low degree of civilized construction, and environmental pollution. Therefore, it is imperative to adopt industrialized ready-mixed mortar. It is an item to ensure the quality of construction projects, improve the modernization level of construction, realize the comprehensive utilization of resources, reduce urban pollution, improve the atmospheric environment, develop bulk cement, and achieve sustainable development. concrete measures.

In addition, at present, my country needs about 600 million tons of sand for construction every year, and most of the areas use natural river sand. Natural river sand resource is a kind of local resource, which is non-renewable in a short time and not suitable for long-distance transportation. With the implementation of environmental protection policies, and because the excessive exploitation of natural river sand will cause damage to the ecological environment, many areas in my country have begun to restrict or ban the mining of natural river sand. The available natural river sand resources have decreased, and the quality of sand has declined and the price Higher and higher. And along with the quickening of urban construction pace, the construction rubbish after the demolition of old house is more and more, handles these construction rubbish to expend a large amount of manpower and material resources, and pollutes the environment.

Mortar cracks and water seepage are very common phenomena in construction engineering. The occurrence and expansion of cracks will cause leakage of the building wall and peeling off of the plaster layer, which will lead to carbonation erosion of the inner concrete or masonry, and make the later buildings The overall strength of the building is reduced, endangering the service life of the building, and in severe cases, it will cause the loss of the building's use function. Cracks and leaks in housing construction not only bring inconvenience to people's lives, but also cause great economic losses to the country. According to statistics, my country spends more than 2,000,000,000 yuan on maintenance of leaking water every year. The annual usage of mortar will reach 750 million m3. If the building mortar has anti-crack and anti-seepage performance, it will reduce the huge maintenance and repair costs caused by mortar cracking and leakage, and save a lot of construction funds. Therefore, mortar has higher requirements for anti-crack and anti-seepage functions.

Colored mortar is a general term for wall plastering with decorative effects. It is composed of inorganic cementitious materials, organic cementitious materials, aggregates and various additives, and is used for the decoration of building wall surfaces. Due to the three-dimensional appearance of the color finishing mortar, the decorative effect is natural and unique, breathable, crack-resistant, and weather-resistant, and the coating thickness can reach 1-3mm, which can be processed into various styles of textured surfaces. Colored finishing mortar widely replaces paint and tiles in Europe, and is used as a material for interior and exterior wall decoration of buildings, and it has gradually begun to be applied in other countries and regions. However, some problems often hinder the development of this technology. The most prominent problem in the application of colored decorative mortar is efflorescence; the other is the color difference of colored decorative mortar. There are many reasons for the color difference. The accuracy of the product, the amount of water in the construction, the construction environment and other factors may lead to the appearance of color difference; there are also problems such as poor stain resistance and cracking.

Contents of the invention

The purpose of the present invention is to provide an anti-staining, stability and mechanical properties and anti-aging properties, no efflorescence, no color difference; but also has good tensile bond strength, compressive strength, impermeability The color ready-mixed mortar and its production method have excellent work performance, easy pumping, easy compacting and other excellent construction properties.

The present invention is achieved like this:

A colored ready-mixed mortar, characterized in that it comprises the following raw materials in parts by weight: 60-70 parts of artificial sand, 12-13 parts of cement, 10-12 parts of grade II fly ash, 1-5 parts of inorganic pigment parts, 0.1-0.5 parts of additives;

The artificial sand is a mixture of one or more of waste construction waste, metallurgical slag, ore, refractory materials, aluminum where clinker, corundum and glass raw materials, after crushing, sand making, drying, sieving Prepared after pore screening;

The inorganic pigment is one or more of titanium dioxide, iron oxide, cobalt chloride, carbon black, chrome yellow and chrome green, and the iron oxide is iron red, iron green or iron yellow.

The additives mentioned above include raw materials in the following weight ratio, the weight ratio of high-performance polycarboxylate superplasticizer: ferric chloride: sodium gluconate: defoamer: air-entraining agent is 50-55:15-20:5 —10:2:0.5, the high-performance polycarboxylate water reducer has a polyester structure; or a polyether structure.

The air-entraining agent mentioned above is the reaction solution of papermaking black liquor and molasses, and its preparation method is: solid content is 40-60% papermaking black liquor weight 1 part and sugarcane molasses weight 1 part adds the 70-90 of weight 1 part % concentrated sulfuric acid reaction for 0.5-1 hours to get.

The fineness modulus of the artificial sand mentioned above is 1.6-2.2, and the weight percentage of the stone powder in the artificial sand is 8-15%.

The production method of the colored ready-mixed mortar of the present invention comprises the following steps: after weighing the artificial sand, cement, Class II fly ash, inorganic pigments, functional additives and additives according to parts by weight, first the Class II fly ash , inorganic pigments, functional additives and additives are put into the mixer for stirring and mixing, then the cement is added into the mixer for stirring and mixing, and finally the artificial sand is added into the mixer for mixing and then put into the finished product packaging tank, and the packaging is inspected to obtain the product.

The present invention adopts two types of high-performance polycarboxylate superplasticizers, one with methacrylic acid as the main chain, carboxylic acid groups and MPEG (Methoxypolyethyleneglycol) as the side chain, polyester structure; the other as the main chain It is polyacrylic acid, the side chain is Vinylalcoholpolyethyleneglycol, polyether structure; the solid content of high-performance polycarboxylate water reducer is 40%.

The outstanding substantive features and remarkable progress of the present invention are:

1. Compared with tile decoration and paint, colored decorative mortar has faster construction speed, 100% higher efficiency, and 50% lower price; colored decorative mortar is only 1-3mm thick and light in weight, which can greatly reduce the load of external thermal insulation system. When used as a high-rise building decoration, bricks will not fall due to negative wind pressure, so that the external wall insulation system is safer and more reliable in use.

2. The additives of the colored ready-mixed mortar of the present invention can significantly improve the impermeability, crack resistance, shrinkage reduction, and water retention rate of the mortar, and the impermeability level reaches 12, which can make the mortar particles bond more tightly and form a package. Achieve impermeability while reducing shrinkage by more than 30%, especially in harsh environments, can reduce shrinkage.

3. The early strength of the colored ready-mixed mortar of the present invention develops rapidly, and it only needs a short curing period even in winter, which ensures the speed of project progress; it has long-term durability; it has strong chemical corrosion resistance and can be used for various special In engineering; on the basis of high water reducing rate and high strength, it also has excellent construction performance such as excellent work performance, easy pumping, and easy compaction.

4. The air-entraining agent and defoamer selected in the present invention have good effects, especially the reaction liquid of papermaking black liquor and molasses, which is low in cost and can be used for waste utilization. Papermaking black liquor contains a large amount of lignin, which can resist the penetration of water molecules after reacting with molasses and sulfuric acid, and also make the mortar produce a certain sticky substance, which is not easy to crack.

5. The air-entraining agent of the present invention also utilizes the sugar and inorganic salt contained in the papermaking black liquor itself, wherein the sugar can reduce the cracks in the hardened mortar due to the hydration temperature rise, which is beneficial to improve the impermeability of the mortar; while the inorganic salt component Make the mortar strong early, which is beneficial to improve the compressive strength of the mortar.

6. The artificial sand and fly ash in the colored ready-mixed mortar of the present invention utilize ironworks waste slag, desulfurization ash and steel slag, industrial tailings and discarded construction waste slag, metallurgical slag, ore, refractory material, bauxite clinker, The production of general industrial solid waste such as corundum and glass raw materials can reduce the use of natural sand. The comprehensive utilization of industrial waste not only promotes sustainable social development, but also plays a major role in promoting circular economy.

detailed description

The present invention is described below in conjunction with embodiment.

Example 1

(1) Raw material and weight:

60 parts of artificial sand, 12 parts of cement, 10 parts of grade II fly ash, 1 part of inorganic pigment, 0.1 part of additive;

The additive includes raw materials in the following weight ratio: high-performance polycarboxylate water reducer: ferric chloride: sodium gluconate: defoamer: air-entraining agent in a weight ratio of 50:15:5:2:0.5, so The above-mentioned high-performance polycarboxylate water reducer has a polyester structure; or a polyether structure.

(2) Production

After weighing artificial sand, cement, class II fly ash, inorganic pigments, functional additives and additives by weight, first put class II fly ash, inorganic pigments, functional additives and additives into the mixer Stir and mix, then add cement to the mixer and mix, and finally add artificial sand to the mixer and mix it into the finished product packaging tank, check the package, and get the product. When the ready-mixed mortar of the present invention is used, it only needs to add the Measure 12-16% of water, stir well and use.

Example 2

(1) Raw material and weight:

665 parts of artificial sand, 12 parts of cement, 11 parts of grade II fly ash, 3 parts of inorganic pigments, and 0.2 parts of additives;

The additive includes raw materials in the following weight ratio: high-performance polycarboxylate water reducer: ferric chloride: sodium gluconate: defoamer: air-entraining agent in a weight ratio of 52:16:6:2:0.5, so The above-mentioned high-performance polycarboxylate water reducer has a polyester structure; or a polyether structure.

(2) Production

After weighing artificial sand, cement, class II fly ash, inorganic pigments, functional additives and additives by weight, first put class II fly ash, inorganic pigments, functional additives and additives into the mixer Stir and mix, then add cement to the mixer and mix, and finally add artificial sand to the mixer and mix it into the finished product packaging tank, check the package, and obtain the product. The ready-mixed mortar of the present invention only needs to be added to the total Measure 12-16% of water, stir well and use.

Example 3

(1) Raw material and weight:

68 parts of artificial sand, 13 parts of cement, 11 parts of grade II fly ash, 4 parts of inorganic pigments, and 0.4 parts of additives;

The additive includes raw materials in the following weight ratio: high-performance polycarboxylate water reducer: ferric chloride: sodium gluconate: defoamer: air-entraining agent in a weight ratio of 54:18:8:2:0.5, so The above-mentioned high-performance polycarboxylate water reducer has a polyester structure; or a polyether structure.

(2) Production

After weighing artificial sand, cement, class II fly ash, inorganic pigments, functional additives and additives by weight, first put class II fly ash, inorganic pigments, functional additives and additives into the mixer Stir and mix, then add cement to the mixer and mix, and finally add artificial sand to the mixer and mix it into the finished product packaging tank, check the package, and get the product. When the ready-mixed mortar of the present invention is used, it only needs to add the Measure 12-16% of water, stir well and use.

Example 4

(1) Raw material and weight:

70 parts of artificial sand, 13 parts of cement, 12 parts of grade II fly ash, 5 parts of inorganic pigments, and 0.5 parts of additives;

The additive includes raw materials in the following weight ratio: high-performance polycarboxylate water reducer: ferric chloride: sodium gluconate: defoamer: air-entraining agent in a weight ratio of 55:20:10:2:0.5, so The above-mentioned high-performance polycarboxylate water reducer has a polyester structure; or a polyether structure.

(2) Production

After weighing artificial sand, cement, class II fly ash, inorganic pigments, functional additives and additives by weight, first put class II fly ash, inorganic pigments, functional additives and additives into the mixer Stir and mix, then add cement to the mixer and mix, and finally add artificial sand to the mixer and mix it into the finished product packaging tank, check the package, and get the product. When the ready-mixed mortar of the present invention is used, it only needs to add the Measure 12-16% of water, stir well and use.

Engineering application examples

The second-phase project of Longchi New Town in Hengxian County, Nanning City, with a total construction area of 190,000 m ² , the outer wall of the building adopts the colored ready-mixed mortar of the present invention, which has good engineering quality, good stain resistance, no efflorescence, color difference, Cracking and other sites, tensile bond strength, setting time, consistency, water retention rate, compressive strength, shrinkage rate and other performances are up to standard, and users have no complaints during use.

Main technical index of the present invention:

It shows that the colored ready-mixed mortar of the present invention has no efflorescence, and technical indicators such as setting time, consistency, water retention rate, compressive strength, shrinkage rate, etc. all conform to national standards and industry standards.

Comprehensive comparison between traditional mortar and ready-mixed mortar:

traditional mortar ready-mixed mortar to stir On-site manual mixing and stirring lead to unstable quality, and it is difficult to control the use time. Often, on-site watering increases the plasticity, resulting in a decrease in the quality of the slurry. The factory is ready-mixed, no on-site mixing is required, just add an appropriate amount of water for a little mixing, and enough use time can use large-scale professional mixing equipment. construction It often requires a lot of base surface watering or interface treatment, mechanical construction is not possible, the labor intensity is high, the construction efficiency is low, the technical dependence on the construction personnel is strong, the deformation is prone to drop and multi-layer construction is required, and watering and maintenance are required. The bottom layer does not need special treatment and can be mechanically constructed with high efficiency. The slurry itself has a strong sticking force, which reduces slurry scattering, has good construction and anti-fall performance, and excellent water retention performance. quality High shrinkage, often cracks, loose structure, easy to leak, weak adhesion with the bottom layer, high hollowing rate. Reduce cracks, have high adhesion to the bottom layer, no hollowing, low shrinkage, high density, strong impermeability, and high durability. loss The adhesion is poor, the construction is easy to scatter, and the water retention capacity is poor, which is easy to cause water loss, air drying, and waste. The adhesion is large, reducing the slurry scattering during construction, the loss is extremely low, the water retention is strong, and it is not easy to cause waste. Storage and transportation of materials To store a variety of raw materials on the construction site and require a large storage space to transport the mortar to the construction site requires additional processes and procedures. Unified packaging or bulk delivery to the construction site, easy storage and loading and unloading, flexible control of dosage, ready-to-use, and ready-to-use, materials are stored near the construction site, easy to manage, and mixed at the construction site without transportation. Civilization Construction A lot of scattered waste materials are left in the process of mixing, storage and construction, and there is a lot of dust, which requires a lot of labor to clean up the dry and hard slurry remaining on the construction site. Reduces the need to clean up waste, just clear out the wrapping paper bag for a clean spot.

Claims (3)

1. a colored premixing mortar, is characterized in that, it comprises the raw material of following parts by weight: wherein, and artificial sand 60-70Part, cement 12-13 part, II level flyash 10-12 part, inorganic pigment 1-5 part, additive 0.1-0.5 part;

Described artificial sand serve as reasons discarded building waste residue, metallurgical slag, ore, refractory material, bauxite grog, diamond dust andThe mixture of one or more of frit, through fragmentation, sand processed, dry, after sieve aperture screening, make;

Described additive comprises the raw material of following weight ratio, high-performance polycarboxylic acids water reducing agent: ferric trichloride: gluconic acid sodium salt:Defoamer: the weight ratio of air entraining agent is 50-55:15-20:5-10:2:0.5, described high-performance polycarboxylic acids water reducing agent, is polyesterType structure; Or polyether-type structure;

Described air entraining agent is the reactant liquor of black liquid and molasses, and its preparation method is: the papermaking that solid content is 40-60% is black1 part of liquid weight adds the strong sulfuric acid response 0.5-1 hour of the 70-90% of 1 part of weight to obtain with 1 part of cane molasses weight;

The production method of described colored premixing mortar comprises the following steps: by artificial sand, cement, II level flyash, inorganic pigment,After additive weighs by weight, first II level flyash, inorganic pigment and additive are put into mixer and are uniformly mixed,Add mixer to be uniformly mixed cement again, enter in finished product packing tank after finally adding mixer to be uniformly mixed artificial sand,Test package, obtains product.

2. colored premixing mortar according to claim 1, is characterized in that: described inorganic pigment is titanium dioxide, oxidationOne or several in iron, cobalt chloride, carbon black, chrome yellow and chrome green.

3. colored premixing mortar according to claim 1, is characterized in that: the modulus of fineness of described artificial sand is 1.6-2.2, the weight percentage of the stone flour of described artificial sand is 8-15%.