Anti-freezing cracking concrete and preparation method thereof
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A technology of concrete and mixture, applied in the field of concrete, can solve the problems affecting the safety of concrete buildings, low anti-expansion strength of concrete, poor frost resistance of concrete, etc. pumping effect
Inactive Publication Date: 2021-02-12
广州市广丰混凝土有限公司
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Problems solved by technology
[0005] In view of the above-mentioned related technologies, the inventor believes that when the freeze-thaw phenomenon occurs, the strength of the concrete against expansion is low, the internal cracks gradually deepen, the cracking speed is accelerated, and water is more likely to penetrate into the interior of the concrete, resulting in a decrease in the frost resistance of the concrete. Poor, affecting the safety of concrete buildings
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Embodiment 1-3
[0063] Embodiment 1-3: a kind of antifreeze cracking concrete, comprises following component:
[0065] Coarse aggregate is a compound of medium sand and fine stone.
[0066] The fine aggregate is a compound of fly ash and mineral powder.
[0067] In Examples 1-3, see Table 2 for the input amount (unit Kg) of each component.
[0068] Table 2
[0069] Example 1 Example 2 Example 3 Polyoxyethylene sorbitan monostearate 2 6 10 Sodium di-sec-octyl maleate sulfonate 2 3 4 Middle sand 850 900 950 fine stone 750 800 850 fly ash 5 67 130 mineral powder 25 85 145 cement 300 325 350
[0070] The preparation method of the antifreeze cracking concrete of embodiment 1-3 comprises the following steps:
[0071] Step 1), take polyoxyethylene sorbitan monostearate and di-sec-octyl sodium...
Embodiment 4
[0075] A kind of frost-resistant cracking concrete, compared with embodiment 2, the difference only lies in:
[0076] In step 1), polyoxyethylene sorbitan monostearate and sodium di-sec-octyl maleate sulfonate are added to the first mixer together with water, and heated to 75°C.
[0077] The molecular weight of polyoxyethylene sorbitan monostearate is 1300.
Embodiment 5
[0079] A kind of concrete using recycled concrete aggregate, compared with embodiment 2, the only difference is:
[0080] In step 1), polyoxyethylene sorbitan monostearate and di-sec-octyl sodium maleate sulfonate are added to the first mixer together with water, and heated to 80°C.
[0081] The molecular weight of polyoxyethylene sorbitan monostearate is 1400.
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Abstract
The invention relates to the field of concrete, and particularly discloses anti-freezing cracking concrete and a preparation method. The concrete comprises polyoxyethylene sorbitan monostearate, sodium di-sec-octyl maleate sulfonate, coarse aggregate, fine aggregate, cement and water. The preparation method of the concrete comprises the following steps: 1) adding the polyoxyethylene sorbitan monostearate and the sodium di-sec-octyl maleate sulfonate into water, and heating to 75-80 DEG C to obtain a first mixture; and 2) adding the first mixture, the cement and the fine aggregate into the coarse aggregate, and uniformly mixing to obtain the anti-freezing cracking concrete. The anti-freezing cracking concrete provided by the invention can improve the freezing resistance and impermeability of the concrete, and the preparation method provided by the invention can improve the workability of a concrete mixture.
Description
technical field [0001] The application relates to the field of concrete, more specifically, it relates to a frost-resistant cracking concrete and a preparation method thereof. Background technique [0002] Concrete is one of the most important civil engineering materials today. It is a kind of artificial stone made of cementitious materials, granular aggregates, water, and admixtures and admixtures added when necessary, prepared in a certain proportion, uniformly stirred, densely formed, cured and hardened. Concrete has the characteristics of rich raw materials, low price and simple production process, so its consumption is increasing. [0003] In the cold regions of northern my country, most of the damage of concrete is related to the freeze-thaw action. The damage of concrete structures under the action of freeze-thaw cycles is related to the service life of buildings, engineering quality, and operational safety. [0004] When the water in the pores or cracks of the conc...
Claims
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