High-performance concrete exposed aggregate agent as well as preparation method and application method for same

A technology of high-performance concrete and application method, applied in the field of cement concrete building materials, can solve the problems of easy evaporation of water on the surface of concrete, and achieve the effects of easy control of exposed stone depth, good curing effect, and large exposed stone time range.

Active Publication Date: 2014-12-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention aims at the problems of the need for film-covering maintenance and the easy evaporation of water on the concrete surface in the construction of exposed stone concrete pavement

Method used

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  • High-performance concrete exposed aggregate agent as well as preparation method and application method for same
  • High-performance concrete exposed aggregate agent as well as preparation method and application method for same
  • High-performance concrete exposed aggregate agent as well as preparation method and application method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Huaxin P.0.42.5 Portland cement was used to prepare cement concrete with Bahe yellow sand with a particle size distribution of 4.75-15mm crushed stone and a fineness modulus of 2.3. The mix ratio is shown in Table 1.

[0031] Table 1 Mix ratio of exposed stone concrete

[0032]

[0033] In parts by mass, 70 parts of water were heated to 40°C, and then 10 parts of sodium citrate, 5 parts of phosphine butane tricarboxylic acid, 2 parts of sodium fluorosilicate, 2 parts of urea, 0.3 parts of surfactant, 0.5 parts of Parts of phthalocyanine pigments are stirred and mixed evenly in the reaction kettle and fully dissolved. The solution was allowed to stand for 2 hours and cooled to room temperature, and 0.5 part of sodium carboxymethyl cellulose was used to adjust the Engels viscosity of the solution to 50s and the pH value to be 10 to obtain component A. 50 parts of water, 30 parts of industrial water glass, 3 parts of sodium hydroxide, and 0.1 part of polyacrylamide are...

Embodiment 2

[0036] Use the mixing ratio in table 1 to prepare concrete, adopt the stone-exposing agent among the embodiment 1, after the concrete molding is plastered, be placed on the surface without obvious water residue (30-90min) and spray the stone-exposing agent A component that is diluted 6 times, and the spraying amount is respectively For: 10Og / m 2 , 15Og / m 2 , 20Og / m 2 , 250g / m 2 , 300g / m 2 , 350g / m 2 , after standing for 10min, spray the dewstone agent B component 150g / m 2 , under the condition of 20 ℃ curing, after 24 hours, use tap water to wash off the surface mortar, and measure the brushing amount of the surface mortar and the structural depth of the exposed concrete slab (according to the standard method of T0961-1995), See test results image 3 and Figure 4 .

Embodiment 3

[0038] Use the mixing ratio in table 1 to prepare concrete, adopt the exposed stone agent prepared in Example 1, after the concrete is formed and plastered, be placed on the surface without obvious water residue (30-90min), spray and dilute 6 times of the exposed stone agent A component, The spraying amount is 250g / m 2 , after standing for 10min, spray the dewstone agent B component 150g / m 2 , cured at 20°C, and the surface mortar was washed with tap water at 14 hours, 20 hours, 26 hours, 32 hours, 38 hours, 44 hours and 56 hours respectively, and the structure of exposed stone concrete was determined. Depth (according to T0961-1995 standard method) and surface mortar brushing amount, see the test results Figure 5 and Image 6 .

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Abstract

The invention discloses a high-performance concrete exposed aggregate agent as well as a preparation method and an application method for the same. The exposed aggregate agent comprises a component A and a component B, wherein the component A is formed by stepwise mixing and stirring water, hydroxyl carboxylate, organic phosphine, fluosilicate, a penetrant, a stabilizer, a surfactant and a pigment, and the total solid content of the component A is 10-30 wt%; and the component B is composed of water, industrial sodium silicate, sodium hydroxide and a modifier. The application method comprises the following steps of: staying concrete until obvious moisture residue is inexistent on the surface after forming and plastering; spraying the component A on the surface of the concrete, and waiting for 5-20 minutes; spraying the component B on the surface of the concrete, and maintaining for 12-72 hours; and performing scouring removal treatment by scouring mortar on the surface with running water. The exposed aggregate agent has the double effects of aggregate exposure and maintenance, and does not need a process of membrane-covering curing, thus increasing construction efficiency and reducing construction cost. The exposed aggregate agent is stable in aggregate exposure effect and adjustable in aggregate exposure time, as well as has the characteristics of being low in dosage, easy to control an aggregate exposure depth, and level and smooth in aggregate exposure depth.

Description

technical field [0001] The invention relates to the construction and preparation of exposed stone on concrete surface and exposed stone cement concrete pavement, in particular to a high-performance concrete exposed stone agent and a preparation and application method thereof, belonging to the field of cement concrete building materials. Background technique [0002] Exposed stone cement concrete pavement is a form of cement concrete pavement in which the coarse aggregate particles are partially exposed on the surface. Compared with traditional cement concrete pavement, it has richer surface microstructure and macroscopic depth. It was researched and applied by the United Kingdom, Belgium and Denmark in the late 1980s and early 1990s, and in 1976 Denmark took the lead in paving the test section of exposed stone cement concrete pavement. In 1992, Austria published a low-noise cement concrete pavement paving method. , the pavement mainly adopts a new type of pavement exposed ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26
Inventor 陈伟申培亮
Owner WUHAN UNIV OF TECH
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