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Technology for making lime-sand brick cured by steam

A production method, the technology of lime-sand bricks, applied in building components, ceramic molding machines, construction, etc., can solve the problems of unfavorable product performance, expensive activator cost, high product cost, etc., and achieve enhanced product market competitiveness and simple production method Feasible, high-performance results

Inactive Publication Date: 2004-10-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problem of canceling the autoclave system, but the activator is expensive, and the K + 、Na + , Cl - , SO 4 2- Plasma is unfavorable to the performance of the product; a large number of useful resources such as cement are used, and the product cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Fly ash from Guangzhou Huangpu Power Plant, quicklime for construction products, and quality requirements of Xijiang river sand in Shunde, Guangdong are shown in Table 1. First, 12 parts by weight of fly ash and 8 parts by weight of quicklime are ground and mixed uniformly, then 80 parts by weight of sand and water with a weight of 12% of the dry mixture are added and stirred evenly. After 4 hours of digestion, the secondary stirring is carried out. Press 70 tons of pressure to press into adobe. Put the adobe into the steam-curing room. Under the condition of relative humidity of 70%-95%, it will rise from room temperature to the curing temperature of 95°C after 4-6 hours. Cool and make lime-sand bricks. Test strength according to GB / T2542-92, see Table 1 for details, and reach the MU10 level in GB11945-1999.

Embodiment 2～5

[0025] On the basis of Example 1, change the pozzolanic material, that is, use Guangdong Meixian volcanic ash, Guangdong Heping County zeolite, burnt clay, and Guangdong Shaogang slag instead of fly ash. The formula, molding, maintenance and strength testing are shown in Table 1. All have reached the MU10 level in GB11945-1999.

Embodiment 6～9

[0027] Fly ash from Guangzhou Huangpu Power Plant, quicklime for building products, and sand from Xijiang river in Shunde, Guangdong are used. See Table 1 for the quality requirements of raw materials. First, 15 parts by weight of fly ash and 10 parts by weight of quicklime are ground and mixed uniformly, then 75 parts by weight of sand and 12% of the weight of the dry mixture are added and stirred evenly. After 4 hours of digestion, the secondary stirring is carried out. Press 70 tons of pressure to press into adobes, and the adobes are put into the steam curing room. In this embodiment, under the condition that the ratio of raw materials remains unchanged, the curing temperature and time are changed, see Table 1 for details, and the relative humidity is kept > 95% for constant temperature steam curing; then naturally cooled to make sand-lime bricks. Test strength according to GB / T2542-92, product testing results are shown in Table 1.

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Abstract

A technology for producing the steam-cured lime-sand bricks uses the volcanic ash material or granular slags of blast furnace (8-15 wt. portions), calcium lime (6-10) and sand (75-85) as raw materials, and includes such steps as ball grinding the volcanic ash material or granular slags and calcium lime, mixing with sand and water, and steam curing at 80-100 deg.c and with relative humidity greater than 95% for 8-24 hr. Its advantages are low cost, saving energy and environmental protection.

Description

technical field [0001] The invention relates to the production technology of lime-sand bricks, in particular to a production method of steam-cured lime-sand bricks. Background technique [0002] Since the innovation of wall materials in our country, various new wall material industries have emerged one after another. However, due to some shortcomings in the product itself, or the traditional construction and usage habits, it is difficult to change for a while, resulting in a slow process of market acceptance of new wall materials. All kinds of bricks have the same shape as clay solid bricks and similar masonry methods, which conform to people's habits and are relatively easy to be accepted by the market. Especially in the 1950s and 1960s in our country, the autoclaved lime-sand bricks, which are now very mature, have stable product performance and mature production and application technology, and their brick shape is the same as that of clay solid bricks. The price is more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/00C04B28/18C04B40/02E04C1/00
Inventor 樊粤明殷素红吴笑梅王元光
Owner SOUTH CHINA UNIV OF TECH
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