Preparation method of composite concrete moisture evaporation inhibitor

Abstract

A preparation method of a composite concrete moisture evaporation inhibitor comprises the following steps: putting 2500-4500 parts by mass of water glass with the concentration of 40%, 40-80 parts by mass of sodium nitrite and 15-25 parts by mass of triethanolamine into a container, heating to 40 DEG C, and stirring for 30 minutes; continuously adding 400-600 parts by mass of sodium methylsilanolate into the mixture, keeping the temperature at 40 DEG C, and continuously stirring for 30 minutes to obtain a mixture A; 60-100 parts by mass of sodium fluosilicate and 400-800 parts by mass of urea are taken and dissolved in 3000-6000 parts by mass of purified water, the mixture is heated to 40 DEG C and stirred for 30 min, and a mixture B is obtained; adding the mixture A into the mixture B, and continuing to stir for 40 minutes to obtain the composite concrete water evaporation inhibitor, the inhibitor provided by the invention has the characteristics of water resistance and high permeability after film formation, meanwhile, the surface strength and anti-carbonization capacity of concrete are improved, and a better water evaporation inhibition effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of concrete moisture evaporation inhibitor, in particular to a preparation method of a composite concrete moisture evaporation inhibitor. Background Art

[0002] During the hydration process of newly poured concrete, water evaporates to the surface, increasing water loss, which delays or hinders the hydration process of cement. As a result, the interior of the concrete cannot fully react to form enough hydration products to fill the space where free water has been lost, making it impossible for the concrete strength to meet the design requirements. In addition, the premature evaporation of free water will also cause the surface volume of the concrete to shrink, forming plastic shrinkage cracks. Severe shrinkage cracks will affect the concrete structure and cause economic losses. How to control the generation of cracks in the plastic stage is of great significance to the durability of concrete.

[0003] Traditional methods to prevent concrete moisture from evaporating too quickly include laying film, covering with grass chains, laying black cotton, non-woven chips, and watering for maintenance. For example, the sides of bridges and irregular structures are not feasible, and are time-consuming, labor-intensive and uneconomical. At this time, another method is usually used: spraying moisture evaporation inhibitors on concrete structures that need to be maintained in time. All curing agent products currently sold on the market are mainly based on film formation to prevent moisture evaporation; and there is no similar product that can both penetrate and waterproof and increase the surface strength of concrete, and has anti-carbonization functions while also having all the functions of similar curing agents. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a composite concrete moisture evaporation inhibitor to solve the problems raised in the above technical background.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0007] S1, put 2500-4500 parts by weight of 40% water glass, 40-80 parts by weight of sodium nitrite and 15-25 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0008] S2, adding 400-600 parts by weight of sodium methylsiliconate to the above mixture, maintaining stirring at 40° C. for 30 min, to obtain mixture A;

[0009] S3, dissolving 60-100 parts by mass of sodium fluorosilicate and 400-800 parts by mass of urea in 3000-6000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0010] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0011] Furthermore, a method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0012] S1, put 2500 parts by weight of 40% water glass, 40 parts by weight of sodium nitrite and 15 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0013] S2, continue to add 400 parts by mass of sodium methyl siliconate to the above mixture, maintain stirring at 40° C. for 30 min, to obtain mixture A;

[0014] S3, dissolving 60 parts by mass of sodium fluorosilicate and 400 parts by mass of urea in 3000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0015] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0016] Furthermore, a method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0017] S1, put 4500 parts by weight of 40% water glass, 80 parts by weight of sodium nitrite and 25 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0018] S2, continue to add 600 parts by mass of sodium methyl siliconate to the above mixture, keep stirring at 40° C. for 30 minutes, to obtain mixture A;

[0019] S3, dissolving 100 parts by mass of sodium fluorosilicate and 800 parts by mass of urea in 6000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0020] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0021] Furthermore, a method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0022] S1, put 3500 parts by weight of 40% water glass, 60 parts by weight of sodium nitrite and 20 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0023] S2, continue to add 500 parts by weight of sodium methylsiliconate to the above mixture, maintain stirring at 40° C. for 30 minutes, to obtain mixture A;

[0024] S3, dissolving 80 parts by mass of sodium fluorosilicate and 600 parts by mass of urea in 4500 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0025] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0026] The beneficial effects of the present invention are as follows: the inhibitor provided by the present invention has the characteristics of waterproofness and high permeability after film formation, while increasing the surface strength and anti-carbonization ability of concrete and having a good water evaporation inhibition effect. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Embodiment 1:

[0029] A method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0030] S1, put 2500 parts by weight of 40% water glass, 40 parts by weight of sodium nitrite and 15 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0031] S2, continue to add 400 parts by mass of sodium methyl siliconate to the above mixture, maintain stirring at 40° C. for 30 min, to obtain mixture A;

[0032] S3, dissolving 60 parts by mass of sodium fluorosilicate and 400 parts by mass of urea in 3000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0033] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0034] Embodiment 2:

[0035] A method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0036] S1, put 4500 parts by weight of 40% water glass, 80 parts by weight of sodium nitrite and 25 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0037] S2, continue to add 600 parts by mass of sodium methyl siliconate to the above mixture, maintain 40 ° C and continue stirring for 30 minutes to obtain mixture A;

[0038] S3, dissolving 100 parts by mass of sodium fluorosilicate and 800 parts by mass of urea in 6000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0039] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0040] Embodiment 3:

[0041] A method for preparing a composite concrete moisture evaporation inhibitor comprises the following preparation steps:

[0042] S1, put 3500 parts by weight of 40% water glass, 60 parts by weight of sodium nitrite and 20 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes;

[0043] S2, continue to add 500 parts by weight of sodium methylsiliconate to the above mixture, maintain stirring at 40° C. for 30 minutes, to obtain mixture A;

[0044] S3, dissolving 80 parts by mass of sodium fluorosilicate and 600 parts by mass of urea in 4500 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B;

[0045] S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

[0046] The inhibitor prepared by the preparation method of the composite concrete moisture evaporation inhibitor provided by the present invention has a drying film-forming time of ≤4h; and is baked in an oven at a temperature of 37.8°C±1.1°C and a humidity of 32%±2% for 72h, and the water loss rate is ≤0.55kg / m 3 ; Compared with wet curing with straw mats, the strength retention rate (28d) is ≥95%; the sunlight reflectivity is ≥60%.

[0047] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for preparing a composite concrete moisture evaporation inhibitor, characterized in that: The method comprises the following preparation steps: S1, put 2500-4500 parts by weight of 40% water glass, 40-80 parts by weight of sodium nitrite and 15-25 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes; S2, adding 400-600 parts by weight of sodium methylsiliconate to the above mixture, maintaining stirring at 40° C. for 30 min, to obtain mixture A; S3, dissolving 60-100 parts by mass of sodium fluorosilicate and 400-800 parts by mass of urea in 3000-6000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B; S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

2. The method for preparing a composite concrete moisture evaporation inhibitor according to claim 1, characterized in that: The method comprises the following preparation steps: S1, put 2500 parts by weight of 40% water glass, 40 parts by weight of sodium nitrite and 15 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes; S2, continue to add 400 parts by mass of sodium methyl siliconate to the above mixture, maintain stirring at 40° C. for 30 min, to obtain mixture A; S3, dissolving 60 parts by mass of sodium fluorosilicate and 400 parts by mass of urea in 3000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B; S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

3. The method for preparing a composite concrete moisture evaporation inhibitor according to claim 1, characterized in that: The method comprises the following preparation steps: S1, put 4500 parts by weight of 40% water glass, 80 parts by weight of sodium nitrite and 25 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes; S2, continue to add 600 parts by mass of sodium methyl siliconate to the above mixture, maintain 40 ° C and continue stirring for 30 minutes to obtain mixture A; S3, dissolving 100 parts by mass of sodium fluorosilicate and 800 parts by mass of urea in 6000 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B; S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.

4. The method for preparing a composite concrete moisture evaporation inhibitor according to claim 1, characterized in that: The method comprises the following preparation steps: S1, put 3500 parts by weight of 40% water glass, 60 parts by weight of sodium nitrite and 20 parts by weight of triethanolamine in a container, heat to 40°C and stir for 30 minutes; S2, continue to add 500 parts by weight of sodium methylsiliconate to the above mixture, maintain stirring at 40° C. for 30 minutes, to obtain mixture A; S3, dissolving 80 parts by mass of sodium fluorosilicate and 600 parts by mass of urea in 4500 parts by mass of pure water, heating to 40° C. and stirring for 30 min to obtain a mixture B; S4. Add mixture A to mixture B and continue stirring for 40 minutes to obtain a composite concrete moisture evaporation inhibitor.