Mineral admixture concrete

Abstract

The invention relates to a mineral admixture concrete. Mineral admixtures are used as concrete cementitous materials, common concrete and a complex of gypsum and sodium sulfate are added and used as activity excitants so as to coordinate the combined action of naphthalenesulfonate formaldehyde condensate and a crude anthracene sulfonate superplasticizer, and the high-efficiency concrete is prepared. Compared with the prior art, the excitants in the invention has the advantages that early excitation effect is good, mixing amount is less, the early or later strength and durance of the concrete can be greatly improved, the concrete dosage is reduced by 5-20% under the condition of maintaining the strength and workability of the concrete not to be changed, and the gypsum and sodium sylfate are both industrial byproducts with low costs. In the invention, concrete plaster is mixed in advance by using a secondary feeding method, residual materials are added in the mixed concrete plaster, and the strength of the concrete is improved while reducing the abrasion of coarse aggregates on equipment. The concrete has the advantages of good workability and less bleeding, is convenient for construction, and can be applied to large-volume concrete engineering, underground engineering, seaport engineering and the like.

Description

technical field [0001] The invention relates to a novel high-performance mineral admixture concrete. Background technique [0002] Cement is a resource and energy-consuming industry, and it is also a CO 2 big emitters. With the rapid development of my country's economy, there is a shortage of non-renewable resources and energy, the pressure on environmental capacity is increasing, and international obligations are increasing. The development model of the cement industry based on resource and energy consumption will inevitably be impacted. [0003] Since 1995, the annual output of my country's cement industry has exceeded 30% of the world's total cement output every year, and since 2002, the annual output has exceeded 40% of the world's total cement output every year. In 2009, my country's cement output has reached 1.65 billion tons, and the cement production capacity has reached 2 billion tons. It can be said that almost half of the world's cement is in China, and the wor...

AI Technical Summary

Problems solved by technology

At present, the annual output of steel in my country has reached about 500 million tons, and the annual discharge of blast furnace slag is about 200 million tons, which is usually used for road construction, backfill, raw materials and mixed materials for cement production, etc., and the utilization amount is less than 80%. The level of utilization is not high, and the rest continues to pile up, which not only occupies a large amount of farmland, hinders traffic and rivers, but also pollutes the environment and endangers the ecological balance.

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