A kind of underwater concrete and preparation method thereof
An underwater concrete and cement technology, applied in the field of concrete, can solve the problems of accelerating electrochemical corrosion of steel bars, easy conduction and migration of electrons, and reducing ohmic resistance, so as to avoid cracks, improve bleeding, and increase strength.
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preparation example 1
[0040] Preparation Example 1: Active silanol was prepared by the following method:
[0041] Weigh 100 g of sodium silicate solution with a mass fraction of 25% and place it in a separatory funnel, then add 100 g of a 35% mass fraction of tetrahydroxyfuran solution, after shaking, let stand for 30 minutes, then add 120 g of sodium chloride, continue to shake, Then put it at 10°C for 4 hours, take the upper layer solution to prepare a layered liquid, add 60 g of anhydrous sodium sulfate, let it stand for 20 min, and filter the filtrate to obtain active silanol.
[0042] Preparation example of modified bamboo fibrils
[0043] The bamboo fiber in the following raw materials was purchased from Ningbo Rengui Bamboo Fiber Technology Co., Ltd., which produced bamboo fiber-c; the amino silicone oil was purchased from the amino silicone oil crude oil produced by Guangzhou Jie Chemical Co., Ltd.; other raw materials and equipment were commercially available.
preparation example 2
[0044] Preparation Example 2: Modified bamboo fibrils were prepared by the following methods:
[0045] Ⅰ Cut the bamboo fibrils into filaments with a diameter of 6-10 mm, wash with water and dry at 160° C. for 30 min to obtain bamboo fibrils, take 38 g of dried bamboo fibrils and place them in 106 g of the active silanol prepared in Preparation Example 1 to soak 15min, take out to dry at room temperature, then wash 3 times with deionized water, dry the washed bamboo fiber at a temperature of 175°C for 2min, and then dry it at 80°C for 16min to obtain pretreated bamboo fiber;
[0046] Ⅱ The pretreated bamboo fiber prepared in I was soaked in 110 g of aminosilicone oil solution with a mass concentration of 0.1% for 15 min, and the soaked pretreated bamboo fiber was placed in a drying oven, dried at 170 ° C for 2 min, and then dried at 78 °C for 15 min. The modified bamboo fibrils were obtained by drying at ℃ for 20 min.
preparation example 3
[0047] Preparation Example 3: Modified bamboo fibrils were prepared by the following methods:
[0048] Ⅰ. The bamboo fibrils are cut into filaments with a diameter of 6-10 mm, washed with water and dried at 160° C. for 30 min to obtain bamboo fibrils, and 30 g of dried bamboo fibrils are weighed and placed in 95 g of the active silanol prepared in Preparation Example 1 to soak. 12min, take out to dry at room temperature, then wash twice with deionized water, dry the washed bamboo fiber at 160°C for 3min, and then dry at 74°C for 20min to obtain pretreated bamboo fiber;
[0049] Ⅱ The pretreated bamboo fiber prepared in I was soaked in 100 g of aminosilicone oil solution with a mass concentration of 0.1% for 10 min. The modified bamboo fibrils were obtained by drying at ℃ for 20 min.
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