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Composite magnesia brick containing plant fiber and its production process

A plant fiber and composite brick technology, applied in the field of building materials, can solve problems such as environmental hazards of salt lake resources, pollution of primary salt lake resources, waste of magnesium resources, etc., and achieve full utilization of hydration heat, good product stability, and hydration heat distribution. uniform effect

Inactive Publication Date: 2002-10-23
同济大学高新建筑技术设计研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of undeveloped magnesium salt products, millions of cubic meters of magnesium-containing tail liquid with great development value are discharged every year, which is not only a waste of resources, but also a hazard to the salt lake resources and environment
It not only causes a huge waste of magnesium resources, but also causes serious pollution to the original salt lake resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 (foaming):

[0043] Magnesium oxide (magnesium activity is 85-90) 10.00kg

[0044] Magnesium chloride solution (concentration is 25%) 24.00kg

[0045] Straw (cut into 3-5mm length) 5.00kg

[0046] Foaming agent (using hydrogen peroxide) 0.20kg

[0047] Fly ash 20.00kg

[0048] Hydrochloric acid 0.80kg

[0049] Volume ratio magnesium oxide: fly ash: grass = 1:2:5

[0050] Weight ratio magnesium oxide: fly ash: grass = 1:2:0.5

[0051] First hydrate the magnesium oxide and magnesium chloride solution, then send various materials into the hopper by the conveyor belt, stir for 3-5 minutes to make them evenly mixed, then add foaming agent, and stir vigorously and quickly for 3 minutes to make them mixed uniform. Then pour it into a steel mold, send it into an oven, heat it to 50°C, and demould it after 180 minutes. After coming out of the oven, put it into the finished product room. At this time, it can also be cut into pieces, and then cured for about 7...

Embodiment 2

[0053] Embodiment 2 (no foaming):

[0054] Magnesium oxide (magnesium activity is 85-90) 5.00kg

[0055] Magnesium chloride solution (concentration is 30%) 7.00kg

[0056] Straw (cut into 3--5mm length) 3.00kg

[0057] Fly ash 5.00kg

[0058] Hydrochloric acid 0.40kg

[0059] Volume ratio magnesium oxide: fly ash: grass = 1:1:6

[0060] Weight ratio magnesium oxide: fly ash: grass = 1:1:0.6

[0061] The preparation process is the same as Example 1.

[0062] Test result: compressive strength 10.29Mpa

Embodiment 3

[0063] Embodiment 3 (porous brick):

[0064] Magnesium oxide (magnesium activity is 85-90) 9.00kg

[0065] Magnesium chloride solution (concentration is 20%) 20.00kg

[0066] Straw (cut into 3-5mm length) 4.50kg

[0067] Fly ash 18.00kg

[0068] Hydrochloric acid 0.72kg volume ratio Magnesium oxide: fly ash: grass=1:2:5 weight ratio Magnesium oxide: fly ash: grass=1:2:0.5 The preparation process is the same as example 1. Test result: compressive strength 9.8Mpa

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Abstract

The plant fibre magnesium composite brick is made from plant fibre, magnesium, oxide, fly-ash, magnesium, chloride and halogen liquor according to a certain mixing ratio through a certain production process. As compared with clay brick it possesses the advantages of light weight, strong toughness, good compression strength and convenient construction, etc..

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a plant fiber magnesia composite brick and a manufacturing method thereof. Background technique [0002] my country is the "Kingdom" of solid clay bricks in the world. Solid clay bricks are common red bricks. At present, more than 80% of wall materials in my country are still using this traditional building material. The production method is basically to borrow soil locally. , Manual or semi-mechanized operation, it is very easy to damage the cultivated land, waste energy and pollute the environment. Statistics show that our country burns 700 billion pieces of solid clay bricks every year, takes 1.4 billion cubic meters of soil, which is equivalent to destroying 1.2 million mu of land, and consumes 60 million tons of standard coal energy. The energy consumption of buildings (most of the buildings in the country are brick-concrete structures) is 120 million tons of stan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32
CPCC04B28/32C04B2111/40Y02W30/91C04B18/08C04B18/24C04B22/12
Inventor 戴复东沈永兴周威武胡向磊孟刚
Owner 同济大学高新建筑技术设计研究所