High-volume mixed ceramic tile aggregate C150UHPC (Ultra-High Performance Concrete) and preparation method thereof

Abstract

The invention discloses high-volume mixed ceramic tile aggregate C150UHPC (Ultra-High Performance Concrete) and a preparation method thereof. The high-volume mixed ceramic tile aggregate C150UHPC is prepared from the following components in proportions: 776.5kg / m<3> of cement, 155.3kg / m<3> of silica fume, 38.8kg / m<3> of pulverized fuel ash, 155.3kg / m<3> of ceramic tile powder, 46.6kg / m<3> of a superplasticizer, 217.4kg / m<3> of ceramic tile aggregate, 869.7kg / m<3> of quartz sand, 184.4kg / m<3> of water and 156kg / m<3> of steel fiber. The invention also discloses the preparation method of the high-volume mixed ceramic tile aggregate C150UHPC. A maintenance mode is characterized by tightly coating a concrete test block by using wet cotton cloth, and intermittently spraying water at a high frequency for maintaining, or maintaining in water. Not only a maintenance system is simplified, but also evaporation of water in concrete is effectively prevented. The high-volume mixed ceramic tile aggregate C150UHPC disclosed by the invention has the following technical advantages that waste ceramic tiles can be recycled, consumption of natural materials is reduced, and the effect of environmental protection is achieved; the ceramic tile powder has pozzolanic activity, so that the strength , the durability, the cracking resistance and the bending strength of the concrete are increased; due to the doping of the ceramic tile powder in different grain diameters, accumulation gaps between the quartz sand is remedied, and the structure is tighter; a water-glue ratio and the superplasticizer are preferably selected, so that the high-volume mixed ceramic tile aggregate C150UHPC has the advantage of self-compaction.

Description

technical field [0001] The invention relates to the technical field of preparation of civil engineering materials, in particular to a high-volume mixed ceramic tile aggregate C150UHPC and a preparation method thereof. Background technique [0002] With the rapid development of modern society, there are more and more super high-rise buildings, long-span bridges, port airports and other super projects. Concrete, as the leading material of building structures, has high strength, high The requirements for durability and high toughness are constantly increasing, and a new type of cement-based composite material, Ultra-High Performance Concrete (UHPC for short), has emerged as the times require. [0003] The traditional UHPC preparation method mainly has two important means, one is to reduce the water-binder ratio of concrete, and increase the strength by reducing the water content in the concrete and reducing water evaporation; the other is to place the concrete in a special curi...

AI Technical Summary

Problems solved by technology

[0004] However, the low water-binder ratio of UHPC increases its viscosity and poor fluidity, making it impossible to form a self-leveling state, which makes on-site construction very difficult, making it generally only used for prefabricated components

Moreover, the maintenance conditions of UHPC are very harsh and the maintenance cost is expensive, which not only brings a heavy burden to the cost of the actual project, but also seriously restricts the application of UHPC on large components.

[0005] With the development of the construction industry, the discarded ceramic tiles produced in the construction industry are also quite amazing. For example, collecting ceramic tile waste and reusing it to produce green building material concrete can not only save natural resources, turn waste into treasure, but also It can reduce environmental pollution, improve the ecological environment, and promote the sustainable development of the ceramic tile industry and social economy, and my country is a large ceramic country. It is estimated that waste ceramic tiles account for 30% of the daily ceramic tile content, but most of its treatment measures It is neither environmentally friendly nor economical to use waste accumulation or landfill methods