CN103496912A - Anti-freezing concrete and preparation method thereof - Google Patents

Abstract

The invention relates to anti-freezing concrete. The composite comprises the following components including, by weight, 400 parts of cement, 800 parts of medium sand, 1000 parts of cobblestones, 200 parts of water and 40-50 parts of ant-freezing agent. The anti-freezing agent comprise the following components including, by weight, 20 parts of isoprene enol methoxy monomer ether-maleic acid-methyl acrylic polymer grafted polymer, 10 parts of propyl alcohol, 8 parts of cholamine, 8 parts of calcium formate and 80 parts of the water. The anti-freezing concrete has the advantages of reasonable components and convenience in use, the anti-freezing agents used can effectively lower the freezing point of the concrete, and construction at the temperature of minus 20 DEG C can be realized.

Description

A kind of frost-resistant concrete and preparation method thereof

Technical field

The present invention relates to build concrete, particularly a kind of frost-resistant concrete and preparation method thereof.

Background technology

In the northern China winter construction, for the quality that guarantees engineering prevents concrete generation freeze injury, mainly take two kinds of safeguard procedures, the one, adopt to cover or go along with sb. to guard him temperature-rising method and prevent that concrete temperature is down to below 0 ℃, this method cost is high, operating process is complicated; The 2nd, admixture frostproofer in concrete, the method construction is simple, and effect is also better, therefore is widely applied.

At present, antifreeze concrete is a lot, and concrete antifreezer is also a lot, but major part does not all reach desirable effect, some is that antifreezing effect is not obvious because of the problem of component, and some is because of the comparison of ingredients complexity in component, in use bad storage, more complicated while using.

Summary of the invention

Defect for existing in prior art, the object of the present invention is to provide a kind of frost-resistant concrete and preparation method thereof.

Technical scheme of the present invention is as follows:

A kind of frost-resistant concrete is become by following component parts by weights array:

400 parts of cement; 800 parts of medium sands; 1000 parts, stone; 200 parts, water; Frostproofer 40-50 part;

Described frostproofer consists of by weight following component:

The large monomer ether-toxilic acid of Polyprenol methoxyl group-20 parts, macromolecular grafted polymkeric substance of methacrylic acid, 10 parts of propyl alcohol, 8 parts of thanomins, 8 parts of calcium formiates, 80 parts, water.

A kind of method for preparing above-mentioned frost-resistant concrete, concrete steps are as follows:

1) component beyond dewatering in frostproofer is mixed, stir 1 hour under 45 ℃, add afterwards water, stir 30min;

2) cement, medium sand and stone are mixed, the frostproofer that adds water and step 1) to prepare, get final product.

Advantage of the present invention is: reasonable recipe of the present invention, easy to use, the use of frostproofer can effectively reduce concrete freezing point, can in the environment of subzero 20 degree, construct.

Embodiment

Embodiment 1

A kind of frost-resistant concrete becomes (every part of 100g) by following component parts by weights array:

400 parts of cement; 800 parts of medium sands; 1000 parts, stone; 200 parts, water; Frostproofer 40-50 part;

Described frostproofer consists of by weight following component:

The large monomer ether-toxilic acid of Polyprenol methoxyl group-20 parts, macromolecular grafted polymkeric substance of methacrylic acid, 10 parts of propyl alcohol, 8 parts of thanomins, 8 parts of calcium formiates, 80 parts, water.

A kind of method for preparing above-mentioned frost-resistant concrete, concrete steps are as follows:

1) component beyond dewatering in frostproofer is mixed, stir 1 hour under 45 ℃, add afterwards water, stir 30min;

2) cement, medium sand and stone are mixed, the frostproofer that adds water and step 1) to prepare, get final product.

Table 1 frost-resistant concrete detected result:

Test item	Set quota (JC475-2004)	Numerical value
			The ammonia burst size	≤ 0.05	0
Low temperature has crystalline deposit	?	Nothing
			Water-reducing rate	≥?0	≥?25
-7 days compressive strength rates	≥ 10	21
			-7+28 days compressive strength rates	≥?85	≥ 140
-7+56 days compressive strength rates	≥ 100	≥ 140

In table 1, can find out, the work-ing life of frost-resistant concrete of the present invention is more durable, is applicable to the construction under low temperature environment.

Claims (2)

1. a frost-resistant concrete is characterized in that being comprised of by weight following component:

400 parts of cement; 800 parts of medium sands; 1000 parts, stone; 200 parts, water; Frostproofer 40-50 part;

Described frostproofer consists of by weight following component: the large monomer ether-toxilic acid of Polyprenol methoxyl group-20 parts, macromolecular grafted polymkeric substance of methacrylic acid, 10 parts of propyl alcohol, 8 parts of thanomins, 8 parts of calcium formiates, 80 parts, water.

2. the preparation method of a frost-resistant concrete according to claim 1 is characterized in that concrete steps are as follows:

1) component beyond dewatering in frostproofer is mixed, stir 1 hour under 45 ℃, add afterwards water, stir 30min;

2) cement, medium sand and stone are mixed, the frostproofer that adds water and step 1) to prepare, get final product.