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Formula for preparing white faced as-cast finish concrete composition

A technology of fair-faced concrete and its composition, which is applied in the formulation field of preparing white-faced fair-faced concrete composition, can solve problems such as large loss of slump over time, difficult control of surface texture, unreasonable component formulation, etc., and achieve slump The loss of strength over time is small, the proportion of components is scientific and reasonable, and the effect of ensuring strength

Active Publication Date: 2011-01-26
ZHEJIANG CONSTR ENG GRP CO LTD
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AI Technical Summary

Problems solved by technology

[0005] Existing fair-faced concrete rarely uses white clear-water concrete technology. Due to the unreasonable component formula and the special properties of white Portland cement, the white clear-water concrete prepared with white Portland cement has a surface texture that is difficult to control. Defects such as large color difference and large loss of slump over time

Method used

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Embodiment Construction

[0025] The components of the white C40 finish fair-faced concrete composition are as follows:

[0026] ⑴. The cement adopts P.W42.5 white Portland cement produced by Aalbo Portland (Anqing) Co., Ltd. Main indicators: The whiteness is greater than 87, the initial setting time shall not be earlier than 45min, and the final setting time shall not be later than 10h, and the stability is qualified. Meet the GBT2015-2005 "White Portland Cement" standard quality requirements.

[0027] ⑵. Fly ash adopts lighter color fly ash from Daba Power Plant in Ningxia Autonomous Region, main indicators: fineness (0.045mm square hole sieve residue) ≤ 12%, loss on ignition ≤ 5%, moisture content ≤ 1%, sulfur trioxide content ≤3%, in line with GB1596-2005 "Fly Ash Used in Cement and Concrete" and other specifications.

[0028] ⑶. The sand is medium sand from Wuzhong High Gate of Ningxia Autonomous Region, with uniform color, fineness modulus 2.6, good gradation, and mud content <3%, mud content <1%, in ...

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Abstract

The invention discloses a formula for preparing a white faced as-cast finish concrete composition. The formula comprises the following components in part by weight: 200 to 280 parts of cement, 85 to 105 parts of water, 330 to 390 parts of sand, 500 to 580 parts of stone, 2.2 to 4.0 parts of admixture and 1 part of titanium white powder. The component proportion of the formula for preparing the white faced as-cast finish concrete composition is scientific and reasonable, the working performance of the formula meets the concrete pumping and casting requirements, and the formula can achieve the effects on no bleeding, no dissociation, low shrinkage and compactness and strong texture of the formed concrete. The high-flow white as-cast finish concrete prepared by adopting the formula has the advantages of good liquidity, good workability and good water-retaining property during concrete construction, low loss in slump, strong pumping property and the like; and the formula can ensure good strength and surface finish of the formed concrete and ensure that the chromatic aberration meets the quality requirement of the faced as-cast finish concrete.

Description

Technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a formula for preparing a white-finished fair-faced concrete composition. The formulation is used to prepare large-liquid white fair-faced concrete, which has good fluidity, workability and water retention during concrete construction. Good, with the advantages of small slump loss over time and strong pumpability, it can ensure the strength of the formed concrete, good surface gloss, and color difference to meet the quality requirements of facing fair-faced concrete. Background technique [0002] Fair-faced concrete, also known as decorative concrete, belongs to one-time casting and does not do any external decoration. It directly uses the natural surface effect of cast-in-place concrete as the decorative surface. Therefore, it is different from ordinary concrete. The surface is flat and smooth, uniform in color, sharp, and no damage And pollution, just apply...

Claims

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Application Information

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IPC IPC(8): C04B28/00
Inventor 金振钱建冯佳
Owner ZHEJIANG CONSTR ENG GRP CO LTD
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