Concrete anti-cracking reinforcing addictive and preparation method thereof

Abstract

Provided are a concrete anti-cracking reinforcing addictive and a preparation method thereof. The concrete anti-cracking reinforcing addictive is prepared from anhydrous rho aluminium oxide, metal aluminum powder, modified short polyester fiber, anhydrous calcined kaolin and calcium oxide powder, the preparation method comprises the steps that the measured anhydrous calcined kaolin and the calciumoxide powder are mixed evenly, and placed into a packaging bag together with the modified short polyester fiber for mixed package, separate sealed package is carried out on the measured anhydrous rhoaluminium oxide, separate sealed package is carried out on the measured metal aluminium powder, and the three packages are placed into one wrappage to be packaged into a finished product; the use steps comprises the mixture of the anhydrous rho aluminium oxide, anhydrous calcined kaolin, calcium oxide powder and modified short polyester fiber is quickly evenly mixed, and added into concrete containing water after being stirred evenly, the metal aluminium powder is placed into a nonmetallic container, water is added, and after being stirred, the metal aluminium powder and the water are added together into the concrete for stirring.

Description

technical field [0001] The invention relates to an additive for concrete anti-cracking enhancement and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Concrete is the most commonly used silicate building material. Cracks often appear in concrete due to its own performance during use, resulting in problems such as strength reduction, cracking and leakage of concrete pouring structures that seriously affect the quality of construction. The reason for the cracks in concrete, in addition to the material and water quality, is the key to the energy change of the grain structure produced by the crystallization process. Cement is clinker mainly composed of tricalcium silicate (3CaO SiO 2 ), dicalcium silicate (β-2CaO SiO 2 ), tricalcium aluminate (3CaO·Al 2 o 3 ) and tetracalcium aluminoferrite (4CaO·Al2O 3 · Fe2O2 3 ) composed of four minerals. The initial hydration process is an energy-absorbing process, for...

AI Technical Summary

Problems solved by technology

These two types of technical routes do not solve the problem of cracks caused by the energy in the process of concrete hydration to solidification

The technical route of waterproofing agent is calcium chloride, ferric chloride, organosilicon, fatty acid and other inorganic salts and gypsum that play an expansion role. These materials play a role in reducing water, but have the effect of reducing the quality of materials. , and the addition of chlorine and sulfur also affects the consistency of the crystal

The technical route of fiber addition can make the crystals in an orderly shape along the fibers when the concrete is initially crystallized, and can improve the crystallization structure, and make cement homogeneous materials such as calcium oxide, zinc oxide, titanium oxide, aluminum oxide, silicon oxide, etc. Finer, to increase the specific surface area and increase the surface energy of the powder, as an additive powder material, can produce a larger crystal structure in the early stage of the hydration process, but it cannot effectively solve the energy demand and energy surplus when the initial crystallization is too small stress crack