Concrete anti-seepage and anti-freezing admixture for plateau complex environment and preparation method thereof

A complex environment and admixture technology, applied in the field of building materials, can solve the problems of low/negative temperature construction and poor durability, and achieve the effect of improving mechanical properties and durability and prolonging the effective construction period

Active Publication Date: 2022-02-08
中交二公局第四工程有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of anti-seepage and anti-freezing concrete admixture for plateau complex environment and its preparation method, so that it can effectively solve the problems of poor durability of concrete in plateau complex environment, low temperature/negative te

Method used

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  • Concrete anti-seepage and anti-freezing admixture for plateau complex environment and preparation method thereof
  • Concrete anti-seepage and anti-freezing admixture for plateau complex environment and preparation method thereof

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preparation example Construction

[0022] A method for preparing a concrete anti-seepage and antifreeze admixture adapted to the complex environment of plateaus, comprising the following steps:

[0023] 1) Weigh each raw material respectively according to the mass ratio of the above-mentioned raw materials;

[0024] 2) Mix and disperse calcium nitrite and calcium formate evenly, and record it as A;

[0025] 3) Methanol and ethylene glycol are mixed and dispersed evenly, and recorded as B;

[0026] 4) Add deionized water and polyoxyethylene ether into the beaker, and stir evenly with a magnetic stirrer at a speed of 30-50 r / min at 30-50 ° C, denoted as C;

[0027] 5) Slowly add sodium dodecylbenzenesulfonate, sodium gluconate, A and B into C in sequence, mix and stir evenly, and record it as D;

[0028] 6) Finally, add sodium polyacrylate to D, and use a magnetic stirrer to stir and mix evenly at a speed of 20-40 r / min to obtain a viscous anti-seepage and antifreeze additive.

Embodiment 1

[0030] The anti-seepage and anti-freeze admixture for concrete adapted to the complex environment of the plateau given in this example is composed of the following raw materials in terms of weight percentage:

[0031] Sodium dodecylbenzenesulfonate 12%, calcium nitrite 8%, calcium formate 4.5%, methanol 5.7%, ethylene glycol 5.4%, sodium gluconate 3.2%, sodium polyacrylate 2.3%, polyoxyethylene ether 12.5% , 46.4% deionized water. The sum of the weight percentages of raw materials is 100%.

[0032] The preparation method of the above-mentioned concrete anti-seepage and anti-freeze admixture adapted to the complex environment of the plateau is carried out according to the following steps:

[0033] Step 1, weighing each raw material respectively according to the mass ratio of the above-mentioned raw materials;

[0034] Step 2, mix and disperse calcium nitrite and calcium formate evenly, record it as A, and set aside;

[0035] Step 3, mix and disperse methanol and ethylene gly...

Embodiment 2

[0040] The difference between this embodiment and the above-mentioned embodiment 1 lies in the ratio of each raw material. The concrete anti-seepage and antifreeze admixture adapted to the complex environment of the plateau is composed of the following raw materials in weight percentage: 10% sodium dodecylbenzenesulfonate, 10% calcium nitrite, and 6% calcium formate , Methanol 5%, Ethylene Glycol 4%, Sodium Gluconate 2%, Sodium Polyacrylate 3%, Polyoxyethylene Ether 14%, Ionized Water 46%. The sum of the weight percentages of raw materials is 100%.

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Abstract

The invention discloses a concrete anti-seepage and anti-freezing admixture suitable for a plateau complex environment and a preparation method thereof. The concrete anti-seepage and anti-freezing admixture comprises the following raw materials in percentage by mass: 10-15% of sodium dodecyl benzene sulfonate, 7-10% of calcium nitrite, 3-6% of calcium formate, 5-8% of methanol, 4-7% of ethylene glycol, 2-5% of sodium gluconate, 1-3% of sodium polyacrylate, 11-14% of polyoxyethylene ether and the balance of deionized water. According to the anti-seepage and anti-freezing admixture disclosed by the invention, the construction of concrete under low-temperature and negative-temperature conditions can be realized, the construction period of the concrete can be prolonged, the early strength of the concrete can be improved, and the durability of the concrete and the service capacity of the concrete under complex plateau environment conditions can be effectively improved.

Description

technical field [0001] The invention belongs to the field of building materials and relates to a concrete admixture, in particular to a concrete anti-seepage and antifreeze admixture for plateau complex environment and a preparation method. Background technique [0002] With the advancement of infrastructure construction to the west and other regions, the proportion of projects in plateau complex areas is increasing, so the demand for concrete is also increasing; for example, the climate environment is complex, the lowest temperature can reach -30 ℃, the The temperature difference can reach 50°C; under extreme climatic conditions, problems such as cracking of concrete structures and poor frost resistance occur frequently, causing great harm to concrete and its structures, seriously shortening the service life of structures, increasing operating and maintenance costs, and even It will bring great harm to social economic development and personal safety. In addition, in the pl...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/60
CPCC04B40/0039C04B2103/601C04B24/20C04B22/082C04B24/04C04B24/026C04B24/10C04B24/26C04B24/32
Inventor 李合银郑睢宁段德峰何锐白永厚王晓川张耀阳秦云强
Owner 中交二公局第四工程有限公司
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