Construction residual soil sludge sintered brick doped with household garbage particles and its preparation method

Abstract

The invention discloses a construction residual soil sludge sintered brick doped with household garbage particles and its preparation method. The sintered brick is composed of the following raw materials by mass: 45-80% of construction residual soil, 10-35% of urban sludge, and 15-30% of an interior fuel. Specifically, with a particle size less than 3mm and a water content of 10%, the interior fuel comprises the components with the following mass percents in the raw materials of the sintered brick: 5-15% of coal slag and coal gangues, and 8-15% of household garbage particles, which are selected from combustible particles that undergo crushing, sorting, and dehydration pretreatments. The method of the invention makes fully use of urban construction residual soil, urban sludge, household garbage and other wastes, and changes waste materials into things of value. And the prepared sintered brick has superior physical and mechanical performances, low production cost, and is energy saving and environment friendly.

Description

technical field [0001] The invention specifically relates to a construction dregs sludge sintered brick mixed with domestic garbage particles and a preparation method thereof. Background technique [0002] my country's construction industry has a huge demand for sintered bricks. In the past, sintered bricks were prepared by excavating farmland clay and sintering, which resulted in a large loss of soil resources and serious destruction of fields. At present, the country has banned the use and production of clay solid bricks, and the use of river and lake silt or construction dregs to make bricks has become a trend to replace clay bricks. [0003] Chinese patent (CN200910184633.1) provides a silt sludge sintered brick, but there is not a large amount of river and lake silt available around most cities, but with the continuous acceleration of the urbanization process, the construction dregs grow at a geometric rate, Its resource utilization has become an urgent problem to ...

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Problems solved by technology

Chinese patent (CN200910184633.1) also proposes to prepare sintered bricks by using wood chips, plant straws, cinders, etc. It is difficult to collect large quantities of plant stalks, and the source is relatively unstable

Weng Jingjing (Technical Research on the Production of Sintered Bricks from River Silt, Master's Degree Thesis of Zhejiang University) proposed an improvement, using expanded polystyrene particles as the internal fuel to form a good circular pore structure, but the cost of raw materials is relatively high, and the polymer The burning of styrene particles will release toxic gases, causing environmental pollution, and the follow-up treatment costs are high