本文選題：混凝土 + 吸水樹脂　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：本文為提高吸水樹脂在混凝土中的分散度和更好發(fā)揮自養(yǎng)護(hù)作用,優(yōu)化了摻吸水樹脂混凝土的攪拌制度。研究吸水樹脂的粒徑、摻量、預(yù)吸水量對(duì)混凝土抗凍性能和水飽和度的影響。攪拌制度對(duì)摻吸水樹脂混凝土比不摻吸水樹脂混凝土影響顯著。攪拌制度對(duì)不摻吸水樹脂混凝土性能影響不大,攪拌制度二(部分水先拌砂石、后加水泥的攪拌方式)比常規(guī)攪拌可以獲得性能更優(yōu)的混凝土。0.1%、0.2%和0.4%摻量吸水樹脂的混凝土抗凍性均有提升作用,其中0.4%摻量混凝土的抗凍性大幅提高。但是混凝土28d抗壓強(qiáng)度降低10%以上。在凍融循環(huán)過程中,0.4%摻量吸水樹脂的混凝土水飽和度也比較低。6次凍融循環(huán)后,混凝土的滲水深度都明顯提高,甚至能夠完全滲透混凝土。在45μm、59μm~75μm和96~150μm三種粒徑中,摻96μm~150μm吸水樹脂混凝土的凍融水飽和度略低,相對(duì)動(dòng)彈性模量下降速度也變慢。同時(shí)摻吸水樹脂混凝土的28d抗壓強(qiáng)度都提高6%~12%。6次凍融循環(huán)后,混凝土的滲水深度隨吸水樹脂粒徑的增大而增大。與空白組相比,吸水樹脂吸30%和50%拌合水的混凝土28d抗壓強(qiáng)度提高11%~13%。吸水樹脂的吸水量對(duì)混凝土抗凍性和水飽和度影響不大。在一定程度上,較大摻量和粒徑吸水樹脂對(duì)混凝土抗凍性提高較大,但摻量較大時(shí)混凝土強(qiáng)度降低,可以采用降低水灰比和加減水劑等方法補(bǔ)償強(qiáng)度的降低。
[Abstract]:In order to improve the dispersity of absorbent resin in concrete and to give full play to self-curing effect, the mixing system of concrete with absorbent resin was optimized in this paper. The effects of particle size, content of water absorbent and preabsorbent on the frost resistance and water saturation of concrete were studied. The mixing system has a significant effect on the concrete with absorbent resin as compared with the concrete without water absorbent. The mixing system has little effect on the performance of concrete without absorbent resin. The concrete with better performance can be obtained by adding cement after mixing. The frost resistance of concrete with 0.2% and 0.4% water absorbent resin can be improved, and the frost resistance of concrete with 0.4% concrete is greatly improved. However, the compressive strength of concrete decreased by more than 10% in 28 days. During freeze-thaw cycle, the water saturation of concrete with 0.4% water absorbent resin is also lower than that of concrete by freezing and thawing cycle, and the seepage depth of concrete can be improved obviously, even the concrete can penetrate completely. The freezing and thawing water saturation of the resin concrete mixed with 96 渭 m or 150 渭 m absorbent resin is slightly lower and the relative dynamic modulus of elasticity decreases slowly in the three particle sizes of 45 渭 m ~ 59 渭 m ~ (75 渭 m) and 96 渭 m ~ 150 渭 m. At the same time, the compressive strength of concrete mixed with absorbent resin for 28 days is increased by 6% 12.6 cycles, and the depth of seepage increases with the increase of the particle size of absorbent resin. Compared with the blank group, the compressive strength of the concrete mixed with 30% and 50% water absorbent resin for 28 days was increased by 11% and 13% respectively. The amount of absorbent resin has little effect on the frost resistance and water saturation of concrete. To a certain extent, the freezing resistance of concrete is greatly improved by larger content and particle size of water-absorbent resin, but the strength of concrete decreases when the content is larger, so the decrease of strength can be compensated by reducing water-cement ratio and adding water-reducing agent.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU528

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