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Pressed cement base plate hardening deforming adjusting method using semi-drying method

An adjustment method, cement-based technology, applied in chemical instruments and methods, manufacturing tools, clay preparation equipment, etc., to achieve obvious economic benefits, reduce defective rate, and simple process

Inactive Publication Date: 2006-12-13
WANFENG COMPOUND STONE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned deformation problem of cement-based materials, the present invention proposes a method for adjusting hardening deformation of cement-based materials with less investment and simple process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] (1) The cement-based substrate in the following examples, expressed in dry basis weight percentage, its composition comprises cement 50~100%, fine sand 0~50% and pigment 0~10%, wherein the amount of water added is cement, fine sand, and 8-15% of the total weight of the three pigments;

[0027] (2) Place the cement-based substrate prepared by compression molding on a steel reinforced thin plate with dense holes and a thickness of 1 mm;

[0028] (3) Send the cement-based substrate placed on the above thin plate into a curing room with a temperature of 80°C and a relative humidity of 90% for curing;

[0029] (4) After one day, take out and observe the deformation of the plate, according to the deformation, determine the amount of water spray applied to the upper pressure surface when the plate is pressed and formed, generally the amount of water spray is 10-50% of the total water content. After spraying water, maintain under natural conditions;

[0030] (5) After three ...

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PUM

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Abstract

The invention relates to a method for moderating deformation during hardening semi-dried cement basic sheet material, and it is characterized in that: adding water during curing period to correct surface formation of shaped cement basic sheet material, and the method comprises following steps: (a) placing cement basic sheet material produced with semi-dry method on thin plate equipped with dense mesh; (b) curing said cement basic sheet material; (c) spraying proper amount of water to pressed surface during pressing cement basic sheet material for shaping according to condition of bending deformation in process of hydrating and hardening. The deformation of cement sheet material is small and the plainness is high.

Description

technical field [0001] The invention relates to a method for adjusting the hardening deformation of a semi-dry pressed cement-based substrate. Background technique [0002] In the process of pressing cement-based materials by the semi-dry method, especially when thin plates are used, there is a common bending deformation from the bottom surface to the top surface, which brings many disadvantages to the subsequent processing of the cement-based materials and the flatness of the product. influences. [0003] The inventor believes that this deformation is due to the fact that the cement-based substrate is pressed from top to bottom in the closed mold, and it always appears as the pressure on the pressed upper layer due to the dominance of the mechanical deformation law of the material. It is larger than the lower layer, which leads to the tightness of the upper layer than the lower layer. As a result, the moisture in the upper layer is squeezed to the lower layer, making the l...

Claims

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Application Information

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IPC IPC(8): B28B11/24B28C7/04
Inventor 汪奇林向承刚肖绍展
Owner WANFENG COMPOUND STONE TECH