A kind of high organic matter river silt composite solidification material and its application

Abstract

The invention discloses a river sludge composite curing material with high organic matter content. Cement, coal ash, quick lime and yellow ground are adopted as main materials; and the additive is one or more of an activator, a reinforcer and an early strength agent; and the river sludge composite curing material comprises the following components in percentage by weight: 40%-60% of river sludge with high organic matter content, 10%-20% of cement, 10%-20% of coal ash, 2%-10% of quick lime, 2%-10% of yellow ground, 0-10% of activator, 0-1% of reinforce and 0-1% of early strength agent, wherein the contents of the activator, the reinforce and the early strength agent cannot be simultaneously zero. The composite curing material disclosed by the invention is applied to the river sludge with high organic matter content, so that the sludge can be cured into a building material. The original method of improving the strength by purely adding cement is improved; the additive disclosed by the invention has the advantages of being small in adding amount, low in price, easily available and high in strength increase proportion. Besides, the river sludge composite curing material disclosed by the invention can be used for effectively increasing the curing strength of the sludge with high organic matter content.

Description

technical field [0001] The invention relates to a composite curing material for solidifying high-organic river silt, and also relates to the application of the composite curing material for curing high-organic river silt into building materials. The invention belongs to the fields of water conservancy and geotechnical building materials. Background technique [0002] The chemical solidification technology of sludge has been widely used. Add solidification material to the sludge, stir and mix, and react with the solidification material through the pore water to change the free water in the pores into bound water, which strengthens the binding force between soil particles and improves the strength of dredged mud. After the sludge is solidified, the water content has decreased significantly, and the engineering performance has been greatly improved. Solidified silt can be used as filling materials for urban construction, dams, roads and bridges, and even gardens to relieve th...

AI Technical Summary

Problems solved by technology

Therefore, for high organic matter sludge, adding cement by traditional methods cannot effectively increase the strength of solidified sludge

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