High-structural-strength concrete for building foundation casting

Abstract

The invention discloses high-structural-strength concrete for building foundation casting. Each square of a foundation includes, by mass, 100-200 parts of ordinary Portland cement, 50-80 parts of gravels, 100-150 parts of silt, 15-25 parts of quick lime, 15-25 parts of iron powder, 40-50 parts of iron ore powder, 15-35 parts of sodium sulfate powder, 15-20 parts of limestone powder, 100-150 parts of rock flour, 100-120 parts of melon seed-shaped drug slices, 200-250 parts of limewater and 50-150 parts of potassium nitrate powder. The concrete does not need a CTF concrete synergistic agent, can have higher structural strength and meet the building needs through matching of the ordinary Portland cement and the iron powder, can effectively reduce the oxidation effect of the iron powder through the sodium sulfate powder and is suitable for popularization and usage, and oxidation and cracking of the concrete are avoided.

Description

technical field [0001] The invention relates to a high structural strength concrete for building foundation pouring. Background technique [0002] With the rapid economic development, my country's construction industry is also developing rapidly, and the amount of concrete used has also increased greatly. However, during the process of pouring and hardening, concrete will cause volume shrinkage due to chemical shrinkage, cold shrinkage and dry shrinkage. And the more cement and water consumption per unit, the larger the volume of concrete, the faster the water evaporates, and the more obvious the shrinkage will be. In general, 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. [0003] In order to solve this problem, according to different concrete mix ratios, curing systems and restraint states, adding an appropriate amount of expansion agent or waterproof...

AI Technical Summary

Problems solved by technology

However, CTF concrete synergists have strict requirements in terms of dosage, restriction and curing conditions, and are restricted by the adaptability of cement and concrete. It is pointed out in the technology that the main factor affecting the crack resistance of concrete is cement, but it ignores that a large amount of sand in the formula will have an important impact on the crack resistance. Due to the small fineness modulus of the sand, the water demand is reduced, and there is no way to shorten the setting time. Neglected contribution, but on the basis of the fact that the CTF concrete synergist has greatly shortened the setting time, the concrete coagulates sharply, and the CTF concrete synergist has no time to disperse the excess cement particles and improve the performance of the water reducer, which is easy to produce slump Large loss, reduced bleeding rate, shortened setting time and other problems make the effect of CTF concrete synergist unable to be fully exerted, and the performance of the obtained concrete is difficult to guarantee