Bentonite modifier and application thereof

Abstract

The invention relates to a bentonite modifier which comprises a water soluble inorganic matter thiosulfate, an organic matter alcohol compound and an amine compound. The modifier is formed by uniformly mixing and dissolving the water soluble inorganic matter thiosulfate, the organic matter alcohol compound and the amine compound with water at a mass ratio of (0.5-1):(0.5-1):(0.5-1):(0.5-1.5). The bentonite modifier provided by the invention is wide in source of raw materials, simple in preparation method, low in cost and good in economical efficiency. Bentonite modified by the bentonite modifier provided by the invention and used in cement can be used for effectively improving the cement strength and the impermeability and salt corrosion resistances of concrete.

Description

technical field [0001] The invention relates to a bentonite modifier, in particular to a bentonite modifier which can be used in cement concrete and an application method thereof. Background technique [0002] Bentonite, also known as bentonite or bentonite, is a clay rock mainly composed of montmorillonite. The chemical formula of montmorillonite is 4SiO 2 ·Al 2 o 3 ·H 2 O, the crystal structure of montmorillonite is a 2:1 layered silicate composed of two layers of silicon-oxygen tetrahedral sheets sandwiched by a layer of aluminum-oxygen octahedral sheets. It has water absorption, swelling, dispersion and suspension, and viscosity. It has a series of physical and chemical properties such as binding, adsorption of organic matter, catalytic activity, thixotropy, plasticity, lubricity and cation exchange, and has good thermal and chemical stability. [0003] Due to the many excellent properties of bentonite's unique mineral structure and crystallization chemical proper...

AI Technical Summary

Problems solved by technology

[0004] However, although bentonite has excellent water absorption expansion, suspension dispersion, water retention, lubricity, and stability, the current unmodified bentonite and various modified bentonites are still not suitable for adding cement concrete as a waterproofing agent or Waterproof and anti-seepage agent or anti-seepage and anti-salt decoration additive. The reason is that montmorillonite, the main mineral of bentonite, is a kind of clay mineral, which still has the characteristics of clay mineral. In the environment, under the joint action of hydrated calcium silicate gel, ferric aluminate and calcium hydroxide crystal minerals and complex ion exchange in the cement hydration process, there is no relationship between bentonite or modified bentonite and cement hydrated minerals. Form an effective fusion zone or strengthen the transition zone, and secondly, bentonite or premature full expansion will cause separation and dry shrinkage channels with cement hydrated minerals, or the original excellent performance will be destroyed or inhibited, and the cementing ability of cement hydrated minerals will also increase. Simultaneously weakened by clay-type minerals

That is, there is still a lack of a modifier that allows bentonite to play an effective waterproof and anti-seepage effect in cement concrete at home and abroad, and a conditioner that can adjust and improve the performance of bentonite in the cement concrete medium environment, resulting in no suitable for cement. Bentonite modifier for concrete waterproof and anti-seepage modification or anti-permeability and salt corrosion modification