Nanometer composite type expansion anti-cracking waterproofing agent

Abstract

The invention relates to a nanometer composite type expansion anti-cracking waterproofing agent. The nanometer composite type expansion anti-cracking waterproofing agent comprises the following components and contents: 9.2%-27.5% of calcium sulphoaluminate, 6.8%-11.2% of calcium aluminate, 7.1%-15.4% of calcium hydroxide, 4.8%-13.6% of PSP organic silicon powder, 3.6%-7.5% of sodium silicate, 0.1%-3.2% of ethanediamine sodium phosphate, 0.5%-2.5% of iron powder, 1.0-3.3% of borate, 0.1%-0.5% of manganese dioxide, 0.1%-2.4% of polypropylene fiber, 0.1%-0.8% of disodium ethylene diamine tetraacetate, 1.8%-4.3% of sodium tripolyphosphate, 15.2%-22.5% of pulverized fuel ash, 5.3%-11.6% of aminophenoxy naphthalene sulfonate and 5.1-8.5% of FP nanometer polymer. The expansion generated by the nanometer composite type expansion anti-cracking waterproofing agent and the contraction of concrete synchronously develop; and fillers generated by the nanometer composite type expansion anti-crackingwaterproofing agent can be used for effectively filling apertures of the concrete at different periods and different quantity values and under different action mechanisms of different crystal minerals. When the nanometer composite type expansion anti-cracking waterproofing agent is restrained by steel bars and adjacent positions, the 0.38MPa-0.8MPa prestressing stress can be generated; and different expansion mineral phases are generated at different ages of the concrete, thereby very effectively controlling the generation and development of non-structural cracks such as the early-stage plastic shrinkage and air shrinkage of the concrete and the cement plaster.

Description

technical field [0001] The invention belongs to the technical field of expansion and anti-cracking waterproofing agent, in particular to a nanocomposite expansion and anti-cracking and waterproofing agent. Background technique [0002] With the rapid development of the economy, my country's construction industry is also developing rapidly, and the use of concrete has also greatly increased. However, during the pouring and hardening process of concrete, volume shrinkage will occur due to reasons such as chemical shrinkage, cold shrinkage, and dry shrinkage. And the more cement and water used per unit, the larger the concrete volume, the faster the water evaporates, and the more obvious the shrinkage. Generally, every 1m 3 The shrinkage value of concrete is 0.04%-0.09%, which leads to adverse consequences such as cracking, leakage, corrosion of steel bars, and loss of prestress in concrete. [0003] In order to solve this problem, according to different concrete mix ratios,...

AI Technical Summary

Problems solved by technology

However, the traditional expansion agent or waterproofing agent has relatively strict requirements in terms of dosage, limitation and curing conditions. Due to the adaptability of cement and concrete, it is easy to cause large slump loss, reduced bleeding rate, and shortened setting time. And other issues

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