A kind of wet mix mortar additive and preparation method thereof

Abstract

The invention provides an additive that can improve the water retention rate and operating time of wet-mixed masonry mortar, plastering mortar or floor mortar in the construction field. The additive includes A component and B component, and A component includes 1% by weight ‑1.5% water retaining agent, 0.1‑0.5% air entraining agent, 2‑5% water reducing agent, 2‑4% early strength agent, 1‑5% coagulant and the rest of water are mixed and stirred ; B component is to be that 5-20% sodium gluconate, 2-10% sucrose, 1-6% borax and surplus water are mixed and stirred by weight percentage; hydroxyethyl cellulose ether, and the air-entraining agent is one or both of sodium α-olefin sulfonate or fatty alcohol polyoxyethylene ether sodium sulfate. The additive formula of the invention is reasonable and easy to use, and when added to the wet-mixed mortar, the wet-mixed mortar can still have good water retention at high temperature and has good storage stability. The present invention also provides a preparation method of the above-mentioned additive.

Description

technical field [0001] The invention relates to a construction mortar additive, in particular to a wet-mix mortar additive, and more particularly to an additive capable of improving the water retention rate and operating time of wet-mix masonry mortar, plastering mortar or floor mortar in the construction field. Background technique [0002] At present, under the requirements and guidance of relevant national industrial policies, especially environmental protection and energy policies, large, medium and small cities across the country have begun to prohibit on-site mixing of mortar, and vigorously promote ready-mixed mortar. Ready-mixed mortar has two types: dry-mixed mortar and wet-mixed mortar. kind of form. Dry-mixed mortar is composed of solid materials such as cementitious materials, mineral admixtures, fine aggregates, and admixtures. It is a dry powder building material that is pre-mixed through a dry-mixing process according to a certain ratio. Mortar is easy to seg...

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Problems solved by technology

[0004] The Chinese patent No. 201410406681.1 provides a wet-mixed mortar admixture, the admixture is composed of A material and B material, A material is composed of the following components by weight: air-entraining agent: 0.8% ~ 2%, Retarder: 2% to 4%, anti-cracking agent: 0.06% to 0.15%, reinforcing agent: 0.6% to 1.2%, water retention agent: 0.3% to 0.7%, and the balance is water; material B consists of the following weight percentage Component composition: water reducing agent: 3% to 12%, shrinkage reducing agent: 0.2% to 0.5%, and the balance is water; since this admixture contains both water retaining agent and retarder in component A, if necessary adjust The operating time of the wet-mixed mortar will inevitably change the amount of each substance added in component A, so that the added amount of the water-retaining component will also change accordingly, and the water-retaining property and density of the wet-mixed mortar will be affected. If you need to solve this problem, you can It is necessary to configure different proportions of component A for different operating times, which is inconvenient for production and use

In addition, when the temperature of sand, cement, water, etc. is high in summer, the wet-mixed mortar added with this admixture will have significantly lower water retention performance and poor storage stability.

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