A kind of anti-mud agent composition for cement-based cementitious material

Abstract

The invention provides a mud-resistant agent composition for a cement-based binding material. The mud-resistant agent is a powdered solid composition, the total mass part number of the raw materials is 100, and the solid solute part comprises the following raw materials in parts by weight: 45-65 parts of a salt intercalator, 10-25 parts of a cationic clay coagulant agent, 10-15 parts of an anionic clay coagulant agent and 10-20 parts of a clay mineral end-face adsorbent. The clay mineral end-face adsorbent is preferably composed of any one or several of sodium silicate with a modulus of 3.0-3.6 and poly-ferric-silicate. According to the formula in the invention, the clay minerals can be easily subjected to hydration swelling due to surface hydration force, osmotic hydration force and capillary action, the cationic clay coagulant agent and the anionic clay coagulant agent can promote clay dispersion phase particles to be easily agglomerated and precipitated, and formation of a layered clay mineral structure capable of adsorbing the moisture and polycarboxylate superplasticizer molecules is eliminated, so that an intercalating space cannot be provided for PCE, and the consumption of clay expansion on water is reduced.

Description

Technical field: [0001] The invention relates to the field of building materials, in particular to an anti-mud agent composition for cement-based cementitious materials. Background technique: [0002] The content of stone powder in machine-made sand is not the fundamental cause of concrete performance deterioration, but the content and composition of mud (also known as clay minerals) in stone powder is the culprit of concrete performance deterioration. Mud powder is a fine particle with a particle size of less than 2 μm. When the mud content is large, it will have adverse effects on the strength, shrinkage performance, impermeability, frost resistance and wear resistance of concrete. If the machine-made sandstone is washed and desilted according to the national standard, although the quality of the aggregate can be improved, it consumes limestone powder resources and water resources that can increase the compactness and strength of concrete, and the discharged sewage and sed...

AI Technical Summary

Problems solved by technology

In view of this, the technical problem to be solved by the present invention is to provide a method suitable for solving the problem of high clay mineral content in ground materials, and the single conventional polycarboxylate water-reducing and slump-retaining agent component cannot solve the problem of mixing cement cementitious materials. Due to the application status of poor initial fluidity and rapid loss in the middle and later stages, the difficulty and key point of the multi-component matching design of anti-sludge agent is to construct a highly adaptable anti-sludge system system with intercalation adsorption and end-capping hydrophobic synergy