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High-strength low-absorption cement base plate slurry and method for making same

A low water absorption, cement-based technology, applied in the field of building materials, can solve problems such as cracking, warping and cracking of plates, and achieve the effects of low water absorption, simplified production process and wide range of uses.

Active Publication Date: 2008-03-12
广东利盈投资集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Finally, the use of high-density cement-based materials prepared with a low water-cement ratio is prone to the problem of self-drying shrinkage. When it comes to forming thinner plates, it is easy to cause warping, cracking and chipping of the plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Slurry and board prepared using ordinary Portland cement. See Table 1 for raw materials and specifications, and Table 2 for material ratios and properties.

[0033] Table 1

[0034] Material

[0035] Table 2 Slurry and boards prepared using ordinary Portland cement (parts by mass)

[0036] project

[0037] (according to cement and silica fume

Embodiment 2

[0038] Example 2: Portland cement is used to prepare the prepared slurry and board. The specifications and manufacturers of the materials used are shown in Table 3, and the material ratio and properties are shown in Table 4.

[0039] table 3

[0040] Material

[0041] Table 4 uses Portland cement to prepare slurry and boards and their comparative examples

[0042] project

[0043] Steel fiber (by volume)

Embodiment 3

[0044] Embodiment 3: see Table 1 for raw material specifications, and see Table 5 for material proportions and properties.

[0045] Table 5 Slurries and panels prepared using ordinary Portland cement

[0046] project

[0047] Known from embodiment 1-embodiment 3, according to the slurry prepared by proportioning of the present invention and preparation process, its flow extension (utilize the truncated cone circular mold test of jumping table fluidity, but do not vibrate) surpasses 250mm, has automatic Compact performance, no need to vibrate when forming the product. The product is demoulded under normal temperature and humidity conditions for 1 day, then soaked in water at room temperature for 28 days, and the flexural strength of the sheet exceeds 15MPa; if it is cured with 90°C steam for 3 days, the flexural strength of the sheet exceeds 20MPa; it is a high-strength material that is easy to form. In addition, the obtained plate has a water absorption rate of les...

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Abstract

The present invention belongs to the building material technology field, in particular to relate to a cement base plate material with high-intension and low water-absorbing capacity and the corresponding preparation method. The mortar material uses a technical process of a self-compact active powder concrete to be cast into a plate with the thickness from several mm to more than 10mm. The present invention is made of cement, silicon ash, quartz powder, sand, water reducer, crack-proof agent and water according to the weight ratio. The present invention uses the new type water reducer and the rational weight ratio to decrease the water consumption and to make the flow expanding degree for the prepared cast mortar up to 255mm (flow degree of the mortar desk, sectioned cone circular mould, not being vibrated); and then the present invention can cast the plate with the required thickness directly without needing vacuum dehydration and pressure. The prepared plate is compact, with the water-absorbing capacity less than 2 percent that is far lower than that of each fibre strengthened cement plate in the prior market (about 20 percent). The folding strength can be adjusted by changing the content of the strengthened fibre, which can be up to 15-25MPa. The materials used in the present invention all are common industrial materials; so the present invention can simplify the manufacturing process, decrease the manufacturing cost greatly and enhance the product quality. The present invention can be widely used.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-strength and low-water-absorption cement substrate material slurry and a preparation method thereof. Background technique [0002] At present, the inorganic material boards on the market mainly include asbestos cement boards, GRC boards, fiber-reinforced silicon-calcium boards, glass magnesium boards (glass fiber reinforced magnesium oxychloride cement boards), etc. The common problem of these boards is that the water content and water absorption rate are very high, which greatly limits their application in places such as outdoor and humid environments (such as basements, underground passages and tunnels). In order to make up for this shortcoming, the method of carrying out waterproof treatment to the above-mentioned boards is mostly adopted now, the process is complicated, the cost is very high, and the problem cannot be solved fundamentally. Becau...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06C04B14/04
CPCC04B28/02C04B2111/27C04B2111/343C04B28/14
Inventor 钟世云
Owner 广东利盈投资集团有限公司
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