High-strength low-water 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 chipping, warping and cracking of plates, and achieve the effects of low water absorption, simplified production process, and wide application

Active Publication Date: 2009-08-26
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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  • High-strength low-water absorption cement base plate slurry and method for making same
  • High-strength low-water absorption cement base plate slurry and method for making same
  • High-strength low-water absorption cement base plate slurry and method for making same

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 Specification or grade source cement PO 42.5 ordinary Portland cement Shanghai Seal Cement Group Silica fume EM920U Elkem International Trading Shanghai Co., Ltd. Quartz powder 320 mesh Anhui Fengyang Fengcheng Powder Material Co., Ltd. Quartz sand 30~70 mesh Anhui Fengyang Fengcheng Powder Material Co., Ltd. steel fiber Section 0.25×0.25mm, length 13mm, in line with the standard

JG / T3064-1999. Produced by Shanghai Qingpu Shangta Metal Fiber Factory Superplasticizer PC new high-efficiency water reducer for concrete; pH neutral; solid

Content 40%; Viscosity (Tu-4 cups) 40s Shanghai Aoshen Architectural Chemical Technology Co., Ltd. Anti-cracking agent Polyethylene glycol, molecular weight 1000 ...

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 Specification or grade source cement PII 52.5R Jiaxin Jingyang Cement Silica fume EM920U Elkem International Trading Shanghai Co., Ltd. Quartz powder 320 mesh Anhui Fengyang Fengcheng Powder Material Co., Ltd. yellow sand Pass 0.63mm sieve Ordinary yellow sand Superplasticizer GLENIUM SP-8CN Shanghai Master Building Materials Co., Ltd. Anti-cracking agent Polyethylene glycol, molecular weight 1600

[0041] Table 4 Slurries and boards prepared with Portland cement and their comparative examples

[0042]

[0043]

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 with ordinary Portland cement

[0046]

[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 immersed 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 less than 2%, and ...

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Abstract

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. The slurry uses self-compacting active powder concrete technology to directly cast a plate with a thickness of several millimeters to more than ten millimeters. It is composed of cement, silica fume, quartz powder, sand, water reducing agent, anti-cracking agent and water in a certain proportion. to make. The present invention reduces water consumption by adopting a new type of water reducing agent and a reasonable proportion, so that the flow expansion of the prepared casting slurry can reach more than 255mm (the flow rate of the mortar jumping table is truncated and circular, and there is no vibration), and it can be directly casted. Plates with required thickness do not need vacuum dehydration and pressurization. The resulting board is dense, with a water absorption rate of less than 2%, which is much lower than that of various fiber-reinforced cement boards currently on the market (about 20%). The flexural strength can be adjusted by the content of reinforcing fibers, which can be higher than 15-25MPa. The raw materials used in the invention are all common industrial raw materials, which simplifies the production process, greatly reduces the production cost, improves the product quality and is 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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Patent Type & Authority Patents(China)
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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