Alkali-activated industrial waste residue marine coral aggregate concrete and preparation method thereof

Abstract

The invention discloses an alkali-activated industrial waste residue marine coral aggregate concrete and a preparation method thereof. The concrete is is prepared from mixing industrial waste residue,coral sand, coral reef stone, seawater and alkali activator. The ratio of active ingredient of alkali activator to industrial waste residue, that is, the amount of alkali added is 12%-16%. The alkali-activated industrial waste residue marine coral aggregate concrete not only realizes the resource reuse of the industrial waste residue, solves that problem of industrial waste residue treatment andat that same time, utilizes island-specific material such as coral reef sand and solves the problem of scarcity of traditional building materials in island areas, and realizes the complete substitution of Portland cement in concrete processing, the use of cement is greatly reduced and the carbon emission is correspondingly reduced, and the slump degree of the prepared alkali-activated industrial waste residue seawater coral concrete is up to 210 mm, the compressive strength is over 50 MPa in 28 days and the tensile-compressive ratio is up to 0.086, the strength of the concrete is better than that of the same type of concrete on the market at present, which is in line with the actual engineering application.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an alkali-activated industrial waste residue seawater coral aggregate concrete and a preparation method thereof. Background technique [0002] The increase in the amount of various types of concrete based on cement has caused enormous pressure on resources and the environment. Under such circumstances, new building material technologies aimed at reducing the amount of cement have developed rapidly. On the other hand, the current generation of industrial waste The amount of waste is far greater than the effective treatment amount, which has caused serious environmental pressure and has become an important factor restricting the rapid development of related industries. Therefore, the effective utilization of industrial waste residues has become an urgent problem to be solved. [0003] Due to the rapid economic development of coastal areas, limited by the coastal environm...

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Problems solved by technology

[0004] 1. Cement is still required as the main component and cannot be completely replaced

[0005] 2. The types of industrial waste residues that can be applied are limited, and various pretreatments are required for industrial waste residues, which increases the processing time and cost

[0006] 3. Most of the prepared coral concrete is C30 concrete, which has low strength and cannot be applied on a large scale