Preparation method of light high-strength building brick

A high-strength technology for construction, which is applied in the field of preparation of light-weight and high-strength construction bricks, can solve problems such as difficulty in meeting the foundation needs of hydraulic structures, less use of high added value, cracks in construction bricks, etc., and achieve green environmental protection Process, improvement and mechanical properties, light weight effect

Pending Publication Date: 2021-07-16
HUOQIU COUNTY LIYUAN NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Silt is a kind of soft soil with a void ratio greater than 1.5. It is a modern sediment formed under the condition of microorganisms participating in the environment with slow water flow in bays, lakes, or river bends. Silt is rich in organic matter and has low mechanical strength. High compressibility, poor water permeability, easy to deform and uneven after loading, if there is silt in the foundation, it will easily cause building subsidence, and it is difficult to meet the needs of hydraulic building foundations
[0004] At present, the cumulative stockpiling of foundation silt has reached nearly 3 billion tons. The stockpiling of foundation silt will cause many environmental hazards, and its disposal has attracted more and more attention from the whole society. At present, high value-added utilization is less
Saving energy is one of the important measures to maintain sustainable economic development. Adding foundation silt to building bricks is one of the important measures to save energy. However, the prepared building bricks cannot form uniform pores, which not only causes heavy weight , and the strength is low, it is easy to cause cracks in building bricks. At present, higher requirements are put forward for lightweight building bricks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing lightweight high-strength building bricks, comprising the steps of:

[0027] S1. Dry 40kg of foundation silt for 2 hours at a drying temperature of 80°C, add 40kg of light corundum, 10kg of light-burned magnesia, and 5kg of calcined alumina micropowder, mix evenly, and send it into a grinder to grind evenly at a grinding pressure of 15kPa to obtain sludge Complex;

[0028] Among them, the water content of the foundation silt is 50wt%, and the void ratio is 1.5; the particle size of light-burned magnesium oxide is less than 75 μm; the particle size of calcined alumina micropowder is less than 3 μm;

[0029] The density of light corundum is 1.64g / cm 3 ; The volume of through pores in light corundum accounts for 30% of the volume of light corundum particles; the particle size of light corundum is less than or equal to 6mm, specifically as follows: the mass percentage of light corundum with a particle size of less than or equal to 6mm and greater tha...

Embodiment 2

[0034] A method for preparing lightweight high-strength building bricks, comprising the steps of:

[0035] S1. Dry 80kg of foundation sludge for 1 hour at a drying temperature of 100°C, add 20kg of light corundum, 30kg of light-burned magnesia, and 1kg of calcined alumina micropowder, mix them evenly, and send them into a grinder to grind evenly at a grinding pressure of 25kPa to obtain sludge Complex;

[0036] Among them, the water content of the foundation silt is 40wt%, and the void ratio is 2.5; the particle size of light-burned magnesium oxide is less than 75 μm; the particle size of calcined alumina micropowder is less than 3 μm;

[0037] The density of light corundum is 1.57g / cm 3 ; The volume of through pores in light corundum accounts for 40% of the volume of light corundum particles; the particle size of light corundum is less than or equal to 6mm, specifically as follows: the mass percentage of light corundum with a particle size of less than or equal to 6mm and gr...

Embodiment 3

[0042] A method for preparing lightweight high-strength building bricks, comprising the steps of:

[0043] S1. Dry 50kg of foundation sludge for 1.7h at a drying temperature of 85°C, add 35kg of light corundum, 15kg of light-burned magnesia, and 4kg of calcined alumina micropowder, mix them evenly, and send them into a grinder to grind them evenly, with a grinding pressure of 18kPa, to obtain sludge compound;

[0044] Among them, the water content of the foundation silt is 47wt%, and the void ratio is 1.8; the particle size of light-burned magnesium oxide is less than 75 μm; the particle size of calcined alumina micropowder is less than 3 μm;

[0045] The density of light corundum is 1.62g / cm 3 The volume of through pores in light corundum accounts for 33% of the volume of light corundum particles; the particle size of light corundum is less than or equal to 6mm, specifically as follows: the mass percentage of light corundum with a particle size of less than or equal to 6mm a...

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Abstract

The invention discloses a preparation method of a light high-strength building brick. The preparation method comprises the following steps: drying foundation sludge for 1-2 hours at the drying temperature of 80-100 DEG C, adding light corundum, light calcined magnesia and calcined alumina micro powder, uniformly mixing, and then uniformly grinding at the pressure of 15-25 kPa to obtain a sludge compound; adding carboxymethyl cellulose and sodium tripolyphosphate into water, uniformly mixing, adding the sludge compound, uniformly stirring, adding a foaming agent in a stirring state, and uniformly stirring to obtain a castable; and uniformly casting the castable, drying and sintering to obtain the light high-strength building brick. The sintering method comprises the following specific operation steps: heating a green body obtained by baking from normal temperature to 300-400 DEG C, preserving heat for t1 hour, cooling to 200-250 DEG C, and preserving heat for t2 hours; then heating to 1200-1300 DEG C, performing heat preservation for t3 h, cooling to 900-1000 DEG C, and performing heat preservation for t4 h; and continously heating to 1400-1450 DEG C, and performing heat preservation for t5 h.

Description

technical field [0001] The invention relates to the technical field of light-weight building brick materials, in particular to a preparation method of light-weight high-strength building bricks. Background technique [0002] At present, affected by the lack of energy at home and abroad and the price of available energy, the development of new energy-saving lightweight materials has a huge market demand at home and abroad. The research and development of environment-friendly lightweight building brick materials and the preparation of low-density, high-strength, low-cost lightweight building bricks have become the mainstream direction. [0003] Silt is a kind of soft soil with a void ratio greater than 1.5. It is a modern sediment formed under the condition of microorganisms participating in the environment with slow water flow in bays, lakes, or river bends. Silt is rich in organic matter and has low mechanical strength. High compressibility, poor water permeability, easy de...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/13C04B33/132C04B33/32
CPCC04B38/0645C04B38/068C04B33/1321C04B33/1305C04B33/131C04B33/32C04B2235/3217C04B2235/3206C04B2235/6562C04B2235/6567C04B2235/77C04B2235/9607Y02P40/60
Inventor 王俊宋丹丹周作香马红杰
Owner HUOQIU COUNTY LIYUAN NEW BUILDING MATERIAL
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