UHPC with high-volume mixed ceramic tile aggregate C160 and preparation method thereof

Abstract

The invention discloses UHPC with high-volume mixed ceramic tile aggregate C160 and a preparation method thereof. The UHPC is prepared from the following components in percentage by weight: 757.5 kg / m<3> of cement, 151.4 kg / m<3> of silica fume, 37.9 kg / m<3> of fly ash, 151.0 kg / m<3> of ceramic tile powder, 46.4 kg / m<3> of a high efficiency water reducing agent, 212.2 kg / m<3> of aggregate, 848.6 kg / m<3> of quartz sand, 189.3 kg / m<3> of water and 156 kg / m<3> of steel fiber. The invention further discloses a preparation method of the UHPC. A curing method comprises the following steps: tightly wrapping a concrete test block with wet cotton cloth, and performing high-frequency intermittent watering curing or curing in water. The curing system is simplified, and evaporation of water in concretecan also be effectively prevented. The UHPC has the following technical advantages: waste ceramic tiles are recycled, consumption of natural materials is reduced, and effects of energy conservation and environmental protection are achieved; the ceramic tile powder has pozzolanic activity, and improves strength, durability, cracking resistance and flexural strength of the concrete. The ceramic tile powder with different particle sizes is added to fill gaps accumulated between quartz sand, so that the structure is more compact; the water-binder ratio and the high-efficiency water reducing agentare preferably selected, and the UHPC has the advantage of self-compacting.

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 C160UHPC 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