Natural activity volcanic ash concrete blunging material and application thereof

Abstract

The invention relates to a natural active volcano ash concrete admixture and the application method thereof. The invention adopts one or two of natural andesite, andesitic basalt, tuff, zeolite and pumice erupted the volcanos in TengChong County and LongLing County of YunNan province. The application method comprises the steps as follows: high thin powder grinding to the volcano ash super thin mineral admixture with the thickness of 45 microns is carried out, the residue on sieve is not more than 15 percent, the specific surface area is 450m2 / kg to 550m2 / kg, the water content is not more than 1 percent, the water needing rate is less than 105 percent and the anti-press intensity of the cement glue sand in 28 days is not less than 65 percent. The invention can partly substitute cement in water and electricity project large dam concrete, the building project concrete and the mortar. The invention is used for building project and varies according to the stage of the type of the power station and the concrete, choosing from 15 to 60 percent of the mixing range, 15 to 30 percent for building project and 40 to 50 percent for building mortar and plasterer mortar. The invention effectively solves the technical problems that the large-volume concrete of setting heat in construction process causes the crete craze. The invention saves the cement dosage, reduces the transportation resource and cost, and reduces the project cost.

Description

Technical field: [0001] The invention relates to building materials and concrete mineral admixtures, in particular to a natural active pozzolanic concrete admixture and its application. Background technique: [0002] Adding a proper amount of admixtures to the concrete of hydropower project dams, powerhouses, tunnels and building projects can increase the compactness of concrete, improve the workability and durability of concrete, reduce the temperature rise of concrete hydration heat, and resist concrete shrinkage cracks , Inhibit alkali-aggregate reaction, save cement, reduce costs, etc. Therefore, large and medium-sized water conservancy and hydropower projects have generally used admixtures, and the application technology of concrete mineral admixtures has also begun to be promoted in urban construction where conditions permit. The commonly used concrete admixtures in China include fly ash, slag powder, etc., and have corresponding technical standards, such as: GB / T1596...

AI Technical Summary

Problems solved by technology

The invention can effectively solve the technical problem of concrete cracking due to the large amount of heat of hydration generated in the construction process of large-volume concrete. It can also obtain local materials, save cement consumption, save social transportation resources and costs, speed up construction progress, and reduce engineering costs.

[0004] The advantages and positive effects of the present invention: not only can effectively solve the technical problem of concrete cracking caused by the large amount of hydration heat generated in the construction process of large-volume concrete in hydropower projects, but also help to control the temperature rise of adiabatic, reduce the shrinkage of concrete, and improve the performance of dams. The seismic performance and durability of concrete, similarly, the application in housing construction projects can effectively improve the workability and durability of concrete