Method for preparing sludge concrete

Abstract

The invention discloses a method for preparing sludge concrete. The method for preparing the sludge concrete comprises the following steps of: weighing the following raw materials in percentage by weight: 1% of ocean sludge, 1-4% of caustic sludge, 0.5-5% of mineral powder, 1-3% of powder coal ash, 0-20% of pebbles, 0-9% of limestone and the like as well as 0.5-3% of catalyst based on the total weight of the above raw materials, wherein the catalyst can be a naphthalene-based superplasticizer, an early-strength slushing agent and the like; and the ocean sludge is obtained by means of grabbing and piling up. The method for preparing the sludge concrete comprises the following steps of: adding all the raw materials into a stirring machine in percentage by weight, and mixing uniformly to obtain a mixture; and standing the mixture for no more than 10 hours according to the water content and the environment temperature so that the mixture reacts fully, thus obtaining the sludge concrete which can be used directly. The method provided by the invention has the advantages of shortening the working period, saving expense, and recycling the sludge and industrial waste slag residues, is rapid in solidification speed, is good in effect, can realize sustainable development of environment-friendly economy and regenerated energy sources, can be applied to pavement concrete, prefabricated blocks, cement stabilizing layers, surface protecting block bodies and the like in municipal administration, traffic, water conservancy and port engineering.

Description

technical field [0001] The invention relates to a new type of concrete manufacturing technology in civil construction engineering, in particular to a method for manufacturing silt concrete. Background technique [0002] The cement concrete used in engineering construction requires a large amount of high-energy-consuming cement and sand and gravel natural resources. With the strengthening of environmental protection, natural resources are becoming increasingly tense, and the supply of sand and gravel materials is in short supply. Especially cement production requires a lot of energy and causes certain environmental pollution. [0003] The treatment and utilization of sludge is one of the main factors affecting the quality, construction period and cost of port projects. With the increasing shortage of natural resources, the utilization of sludge as port waste is a long-term problem in port projects. The silt in Lianyungang has fine particles, high water content, and poor phys...

AI Technical Summary

Problems solved by technology

[0005] With the rapid development of the national economy, industries and factories have risen rapidly, but due to the imperfect industrial chain, various industrial wastes cannot be fully utilized, such as alkali slag

A large amount of alkali slag is produced during the production process of the alkali plant, which piles up like a mountain, occupies a large amount of farmland and sea area, and causes huge pollution to the environment. The reuse of alkali slag has become a difficult problem in the world

Thermal power plants and steel mills produce a large amount of slag and fly ash. In recent years, my country has made great progress in the utilization of slag and fly ash, but they are only used as auxiliary materials for building materials, and their chemical properties have not been fully utilized.