Unfired water permeable brick based on granite waste and fire coal slag and preparation method of unfired water permeable brick

A technology for granite waste and coal-fired slag, applied in cement production and other directions, can solve the problems of low utilization rate of coal-fired slag and desulfurized gypsum resources, and achieve the effects of fine granite structure, reduction of dosage, and improvement of product performance.

Active Publication Date: 2021-11-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, it is necessary to provide a non-fired permeable brick based on granite waste and coal-fired slag and its preparation method to solve the technical problem of low resource utilization of granite waste, coal-fired slag and desulfurized gypsum in the prior art

Method used

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preparation example Construction

[0042] A second aspect of the present invention provides a method for preparing unfired permeable bricks based on granite waste and coal slag, comprising the following steps:

[0043] S1. Uniformly mix granite particles, granite powder, activated coal slag, modified desulfurized gypsum, quicklime, cement, admixture and water to obtain a clean slurry;

[0044] S2. Inject the above-mentioned clean slurry into the mould, press and form it, and perform constant temperature maintenance to obtain unfired permeable bricks.

[0045] In the present invention, the molding pressure is 1-10 MPa.

[0046] In the present invention, the temperature range of normal temperature is 15-40° C., and the curing time at normal temperature is 3-28 days.

Embodiment 1

[0048] (1) Put the coal-fired slag in the oven, and bake until the quality does not change. After cooling to room temperature, add 10wt% sodium hydroxide particles and 5wt% calcium oxide particles to the coal-fired slag and mix them with vibration Grinding and vibrating for 30 seconds to obtain a powder with a mesh size of 400; then roasting the powder at 600°C for 2 hours, and cooling naturally to obtain composite activated active coal slag;

[0049] (2) Dry the flue gas desulfurization gypsum in an oven at 80°C to constant weight, vibrate and grind for 30 seconds after cooling to obtain flue gas desulfurization gypsum powder with a mesh number of 200, and then calcinate the flue gas desulfurization gypsum powder in a muffle furnace ( Calcination conditions: heating rate 3°C / s, heat preservation at 160°C for 2h), and aging the calcined powder under natural conditions for 1d to obtain pretreated desulfurized gypsum;

[0050] (3) According to parts by weight, the raw materials ...

Embodiment 2

[0053] (1) Put the coal-fired slag in the oven, and bake until the quality does not change. After cooling to room temperature, add 10wt% sodium hydroxide particles and 5wt% calcium oxide particles to the coal-fired slag and mix them with vibration Grinding and vibrating for 30 seconds to obtain a powder with a mesh size of 400; then roasting the powder at 600°C for 2 hours, and cooling naturally to obtain composite activated active coal slag;

[0054] (2) Dry the flue gas desulfurization gypsum in an oven at 80°C to constant weight, vibrate and grind for 30 seconds after cooling to obtain flue gas desulfurization gypsum powder with a mesh size of 200 mesh, and then calcinate the flue gas desulfurization gypsum powder in a muffle furnace ( Calcination conditions: heating rate 3°C / s, heat preservation at 160°C for 2h), and aging the calcined powder under natural conditions for 1d to obtain pretreated desulfurized gypsum;

[0055] (3) According to parts by weight, the raw materia...

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Abstract

The invention discloses an unfired water permeable brick based on granite waste and fire coal slag and a preparation method of the unfired water permeable brick. The unfired water permeable brick is prepared from the following raw materials in parts by weight: 160 to 250 parts of granite particles, 5 to 15 parts of granite powder, 15 to 25 parts of active fire coal slag, 2 to 10 parts of modified desulfurized gypsum, 2 to 8 parts of quick lime, 10 to 20 parts of cement, 1 to 5 parts of additive and water. The water permeable brick is prepared by taking the granite waste and the fire coal slag as main raw materials, a large amount of solid waste is consumed, waste is turned into wealth, low-cost preparation of the water permeable brick is realized, the water permeable brick has the characteristics of stable ecology, energy conservation, environmental protection and resource circulation, and meanwhile, the problems of land resource waste and environmental pollution caused by solid waste accumulation are solved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a burn-free permeable brick based on granite waste and coal slag and a preparation method thereof. Background technique [0002] The rapid development of urbanization, the surge of population and the expansion of scale have affected the natural water system of the city, degraded the water ecosystem and aggravated the pollution of the water environment. In recent years, the number of impermeable pavements in my country's urban construction has increased, resulting in a decrease in rainfall infiltration, and urban waterlogging has become increasingly serious. To this end, my country has proposed the strategy of building a "sponge city" to strengthen urban rainwater management, that is, replace traditional paving materials with permeable materials to improve the efficiency of urban rainwater management. As a common water-permeable material, permeable bricks contribute to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B7/28C04B14/04
CPCC04B28/144C04B14/048C04B7/28C04B2201/50C04B2111/00017C04B7/34C04B7/00C04B2103/302Y02P40/10Y02W30/91
Inventor 包申旭桂娅琼黄敏张一敏黄修林
Owner WUHAN UNIV OF TECH
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