Municipal sludge non-sintered ceramsite and production method thereof

Abstract

The invention discloses a municipal sludge non-sintered ceramsite and a production method thereof. The municipal sludge non-sintered ceramsite is produced from, by weight, 40-60% of municipal sludge, 20-30% of cement, 5-10% of fly ash, 3-7% of desulfurized gypsum, 3-7% of slag micro-powder and 4-6% of sodium silicate, wherein the municipal sludge is deodorized municipal sludge, and the content of the municipal sludge is controlled to be 70-80%; the content of free water in the desulfurized gypsum is 10-15%, the average granularity is 20-50 [mu]m, and the 200 mesh screen residue is 5.2%; the ignition loss of the slag micro-powder is 1.77%, and the specific surface area of the reduced slag micro-powder is 450 m<2> / kg; and the sodium silicate is powdery, the mass percentage of water-insoluble substances is not greater than 0.04%, the mass percentage of water is not greater than 25%, the modulus is 2.6-2.8, and the granularity is 20-40 meshes. The municipal sludge non-sintered ceramsite can digest a large amount of municipal sludge, and also can digest fly ash, slag micro-powder, desulfurized gypsum and other industrial wastes, so the utilization approach of above solid wastes is widened; and compared with a roasting technology, a non-sintering technology adopted by the above product has the advantages of energy saving, low carbon and environmental protection.

Description

technical field [0001] The invention relates to the field of building materials, in particular to municipal sludge burn-free ceramsite and a production method thereof. Background technique [0002] Ceramsite, as a lightweight aggregate for construction, has received great attention for its light weight, heat preservation, and environmental protection. At present, my country's ceramsite is mainly clay ceramsite, and the source of clay raw materials is mostly from cultivated land, which does not conform to the sustainable development strategy. Therefore, the sludge from the sewage plant is used as the main raw material, and a certain amount of auxiliary materials and admixtures are added to make lightweight ceramsite with a certain strength after decarbonization and swelling, which can consume a large amount of dewatered sludge, and not only the treatment cost is greatly reduced It is better than the incineration method, and can avoid the secondary pollution of sludge, especia...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of quality problems such as leakage or large-area watermarks in the existing window walls when any violent storm invades, and to provide an anti-leakage treatment method for the window walls of the outer walls of high-rise buildings