Non-autoclave primary health care (PHC) pipe pile concrete containing early strength composite mineral material and preparation method thereof

A technology of PHC pipe piles and composite minerals, applied in the field of building materials, can solve problems such as high production costs, heavy environmental pollution, and high energy consumption, and achieve the effect of improving work performance

Active Publication Date: 2014-06-11
安徽省恒泰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the maintenance process needs to provide a large amount of saturated steam, which consumes a lot o

Method used

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  • Non-autoclave primary health care (PHC) pipe pile concrete containing early strength composite mineral material and preparation method thereof
  • Non-autoclave primary health care (PHC) pipe pile concrete containing early strength composite mineral material and preparation method thereof
  • Non-autoclave primary health care (PHC) pipe pile concrete containing early strength composite mineral material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Concrete Formulation

[0033] Concrete formula of the present invention is as shown in table 1:

[0034] Table 1 Autoclaved concrete formula

[0035]

[0036] The cement in the cementitious material in Table 1 is selected from commercially available P.O52.5 ordinary Portland cement.

[0037] The calcium-rich material is selected from anhydrite powder; anhydrite powder, fineness 200 mesh, specific surface area ≥ 400m 2 / kg, 0.045mm sieve is less than 1%; SO 3 The content is 48% to 52%.

[0038] The silicon-rich material is selected from one or more composite materials of blast furnace slag powder, fly ash, calcined kaolin, zeolite powder, and silica fume. The slag powder is S95 grade pure slag active powder, and the fly ash is selected from Class II F fly ash, with a fineness of 0.045mm and a sieve residue of 0.5% to 0.8%; the metakaolinite component in the calcined kaolin is 42% ~45%, the content of active aluminum material in the zeolite powder is 30...

Embodiment 2

[0046] Embodiment 2 PHC autoclaved pipe pile processing technology

[0047] The specific process steps are as follows:

[0048] 1) According to the mix ratio of autoclaved concrete, first measure the total amount of cementitious material required for the corresponding volume, weigh the anhydrite powder and slag powder in the proportion of the total cementitious material, replace the cement in equal amounts, and then weigh The remaining amount of cement, then weigh the water reducer, water, coarse aggregate, and fine aggregate;

[0049] 2) Feed the weighed coarse aggregate and fine aggregate into the mixing pot first, then feed the weighed cement, slag powder and anhydrite powder into the stirring pot together, first stir the mixture at an even speed, Stop after 60 seconds;

[0050] 3) Then add water and water reducing agent together, and deduct the water content of water reducing agent from the total amount of water at the same time, carry out uniform speed stirring for 120 ...

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Abstract

The invention relates to non-autoclave primary health care (PHC) pipe pile concrete. The concrete is characterized by being prepared from the following raw materials: a binding material, a water reducing agent, water, coarse aggregate, and fine aggregate, wherein the binding material is prepared from the following raw materials by mass ratio: 3.0-8.0% of rich calcareous material, 25-40% of rich siliceous material and the balance of cement; the water reducing agent accounts for 0.4-0.8% of weight of the binding material; the water cement ratio of the concrete is 29-31%; the sand ratio is 33-35%; the volume-weight is 2480-2500kg/m<3>. The rich calcareous material and the rich siliceous material are compounded at a ratio of 1:4 or 1:6; the cement is excited to hydrate for the second time; the early strength is improved; the C80 strength grade requirements can be met by one-time atmospheric pressure steam maintenance for 6 hours; the performances, such as the volume stability, the carbonizing resistance, corrosion of reinforcement, the chloride penetration resistance, the freeze-thaw resistance, the acid corrosion resistance, the salt corrosion resistance and the like of the PHC pipe pile concrete are improved and changed, and the late durability of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an autoclaved-free PHC pipe pile concrete containing early-strength composite mineral materials and a preparation method thereof Background technique [0002] With the rapid development of engineering construction technology and the continuous updating of construction technology and mechanical equipment of foundation treatment engineering, high-strength concrete prestressed static pressure pipe piles have been widely used in foundation treatment of high-rise building projects in large and medium-sized cities. PH C pipe pile is one of the most widely used foundation construction materials at the present stage. PHC pipe pile products often adopt the secondary curing process of atmospheric pressure steam curing and high pressure steam curing in the production process to meet the requirements of tensile strength and improve production. Efficiency, so that it can meet the p...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 黄河蒋正武李祥飞王浩杨正宏董兵刘少林余洪玲张青莉
Owner 安徽省恒泰新材料有限公司
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