Building mortar additive and production method thereof

Abstract

The invention relates to a building mortar additive and a production method thereof. The building mortar additive is prepared by the following raw materials in parts by weight: 50-60 parts of sepiolite, 40-50 parts of calcium carbonate, 6-8 parts of lauryl sodium sulfate, 1.2-2 parts of calcium lignosulfonate, 1.6-2.5 parts of triethanolamine, 2-4 parts of dihydroxyethyl dodecylacyl, 2-3 parts ofnonyl phenol polyvinyl ether, 0.2-0.4 part of tributyl phosphate (TBP) and 3-5 parts of ethylene glycol. The production method is as follows: adding the sepiolite and calcium carbonate to a stirrer, and adding the other raw materials to the stirrer for sealed stir for 13-15min to obtain a powdery product. The additive in the invention enables the mortar consistency to be in direction proportion to mortar strength, adapts to use requirements in low temperature environments, and achieves the anti-freezing purpose without adding other anti-freezing materials additionally; and when the additive is used as an additive for whitewash mortar, the mortar can be plastered on the smooth surface of concrete in no need of lime putty and other auxiliary materials, thus solving the difficult problem of cracked and hollow mortar in the process of plastering the concrete smooth surface, having the capability of replacing the lime putty in whitewash mortar completely and realizing low carbon and environment protection.

Description

Technical field: [0001] The invention relates to building mortar materials and production methods thereof, in particular to building mortar admixtures and production methods thereof. Background technique: [0002] In the process of building construction, mortar is a commonly used masonry and stucco construction material. It is mainly made of sand and cement or lime paste with water. It is usually required that the mortar has good workability and strength, and it is generally added to the mortar. Mortar admixture, the main function of the mortar admixture in the prior art is to improve the workability of the mortar, or reduce the amount of lime paste or even completely replace it, so as to reduce the cost. Such as Chinese patent application 200510017575.5, discloses a kind of mortar admixture and preparation method, and its admixture weight parts are: fly ash 60-85, anhydrous sodium sulfate 4-29.5, triethanolamine 2.5-3, fatty alcohol polyoxyethylene Sodium ether sulfate 2.5...

AI Technical Summary

Problems solved by technology

Its purpose is to use fly ash instead of lime to save energy, but it only simply replaces the lime paste in the mortar, and its function is relatively single. It does not discuss technical issues such as the relationship between mortar and workability and strength, and cohesion , and did not provide actual use effect data to prove that it has achieved the claimed technical effect

Chinese patent application 200810069204.5 discloses a multifunctional mortar admixture, the admixture weight parts are: rosin 15-40, soda ash 2-10, tartaric acid 1-8, triisopropanolamine 2-13, ferrous sulfate 2- 10. Water 40-100. Although the admixture adds several additives to improve the workability and strength of the mortar, it can also play a certain role, but it also does not provide relevant proof of the actual use effect

On the other hand, its production process is complicated. Since the raw materials include rosin, soda ash and other substances that need to be melted or reacted at high temperature, heating reaction is required in the production process, and the operation is cumbersome, which makes the additional cost of the production process too high and cannot completely replace it. Lime, the impact of using lime on the ecological environment cannot be avoided, it cannot be low-carbon and environmentally friendly, and it is not conducive to environmental protection

[0003] On the other hand, the above two patent applications have not made effective breakthroughs in how to simultaneously improve the workability and strength of the mortar, prevent cracking and hollowing of the concrete when the smooth surface is painted, and the adhesion of the mortar needs to be improved, which has not been solved. The following problems: the mixing process in the mortar requires a large amount of water to ensure the mixing effect, and after the mortar is used, the water content should be as low as possible to ensure the compactness and strength, so that the workability and strength of the mortar cannot be synchronized Enhancement, such as solving the mortar consistency, will affect the mortar strength due to the low density of the mortar, especially with the improvement of the workability of the mortar and the increase of water content. After the use process is completed, a large amount of water needs to evaporate. Time Long, after the water evaporates, the density of the mortar is difficult to guarantee, that is, it has a great impact on the strength of the mortar in the later stage, especially it cannot adapt to the change of the ambient temperature, it is not conducive to use in a low temperature environment, the water evaporates for a long time, and it is easy to freeze. When the temperature is below zero, antifreeze materials must be used, otherwise the mortar will become brittle due to water crystallization and affect the strength of the mortar; the above-mentioned admixtures do not significantly enhance the adhesion of the mortar, and the mortar is easy to crack and hollow when the smooth concrete surface is painted. In order to enhance the adhesion performance of the plaster mortar, it is usually necessary to increase the amount of lime paste, which affects the environment of the construction site. Generally, it is necessary to dig grooves on the smooth surface of the concrete and use auxiliary materials such as interface agents, which consumes time and materials and increases construction costs.

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