Waterproof concrete, concrete member and preparation method of concrete member

Abstract

The invention discloses waterproof concrete. The waterproof concrete comprises components as follows: 42.5R ordinary Portland cement, a foaming agent, a coagulation accelerator, a water reducing agent, a foam stabilizer, a waterproof agent and nano-SiO2. The invention further discloses a concrete member and a preparation method thereof. Pores in the waterproof concrete become smaller and more uniform, degree of sphericity is increased, and communication ratio of the pores is reduced; plastic shrinkage cracking value is reduced by 82.1%, cracks of level 2 or higher of plastic shrinkage cracks disappear, and proportion of cracks of level 1 is as high as 70.1%; 3d breaking strength and compressive strength are increased by 41.7% and 16.0% respectively, and 28d breaking strength and compressive strength are increased by 25.0% and 10.0% respectively; certain bearing capacity and better pseudo-ductility can be kept in a period of time after initial cracking of a sample, and bend ductility is remarkably improved.

Description

technical field [0001] The invention relates to the field of construction, more specifically to a waterproof concrete, a concrete component and a preparation method thereof. Background technique [0002] Since the invention of Portland cement by J.Aspdin in 1824, cement-based materials have been widely used in engineering for nearly 200 years. Important structural materials for engineering structures. Cement-based materials are already one of the most widely used and used building materials in civil engineering, and have made extremely important contributions to human development and progress. With the development of complex structures such as large spans in civil engineering and the increasingly complex engineering environment, people have put forward higher requirements for the performance, strength, impermeability, durability and intelligence of cement-based materials. . [0003] Concrete can play a certain waterproof role in building structures, so it is widely used i...

AI Technical Summary

Problems solved by technology

However, in many engineering projects, concrete does not achieve the expected waterproof effect, resulting in serious water leakage in many building structures, which brings great inconvenience to production and life

At the same time, water leakage corrodes steel bars to a certain extent, damages buildings, and causes safety hazards

In addition, frequent repairs and repairs increase economic expenditure, and may not receive good results