本文選題：硅粉 + 磚粒��； 參考：《西安建筑科技大學(xué)》2014年碩士論文

【摘要】：隨著城鎮(zhèn)化進(jìn)程的加快，建筑垃圾的堆積量達(dá)到了前所未有的高度。利用建筑垃圾制備再生混凝土以達(dá)到廢棄物的回收再利用，已成為當(dāng)今的熱門話題�；诖�，本文利用課題組收集到的再生骨料，充分利用硅粉的填充及其活性，纖維的增韌阻裂特性以及磚粒的吸水率大等特性，設(shè)計(jì)并制作了不同摻入量的硅粉、磚粒改性再生混凝土試塊，并以此試驗(yàn)特性為基礎(chǔ)，制作了不同摻合料的11根改性再生混凝土梁與5根不同摻量的柱，對梁、柱進(jìn)行了相關(guān)性能試驗(yàn)，所得試驗(yàn)結(jié)果如下所示： （1）以不同摻量的硅粉、磚粒為主要參數(shù)，對改性再生混凝土試塊進(jìn)行了立方體及軸心抗壓強(qiáng)度、抗折強(qiáng)度、劈裂抗拉強(qiáng)度以及彈性模量的試驗(yàn)研究，分析了不同摻合料的改性再生混凝土的力學(xué)材料性能。 （2）以不同摻合料的試塊力學(xué)性能為基礎(chǔ)，設(shè)計(jì)并制作了11根硅粉、磚粒改性再生混凝土梁，對其進(jìn)行三分點(diǎn)加載試驗(yàn)，對其荷載—位移曲線、承載力及變形等進(jìn)行了對比分析，得到了三種改性材料對試件梁各性能的影響結(jié)果。 （3）以某實(shí)際框架柱為基礎(chǔ)，采用1：2的縮尺準(zhǔn)則，設(shè)計(jì)了5根硅粉、磚粒改性再生混凝土柱的低周反復(fù)荷載試驗(yàn)，并對其破壞規(guī)律、滯回曲線、骨架曲線、延性性能、剛度衰減、能量耗散等抗震性能綜合指標(biāo)進(jìn)行了計(jì)算分析，并得到了一些可供參考的結(jié)論與建議。 研究結(jié)果表明，硅粉的摻入能夠增強(qiáng)再生混凝土的抗壓強(qiáng)度；少量的磚粒的摻入使試塊的抗壓強(qiáng)度與軸心抗壓強(qiáng)度有小幅度的提高。同時(shí)少量的硅粉能夠降低試件梁的各撓度特征值，適量的硅粉能夠提高再生混凝土梁的開裂荷載；少量的磚粒能夠提高再生混凝土梁的開裂荷載，使其屈服荷載與極限荷載均出現(xiàn)不同程度的降低；且降低的幅度隨摻量的增加而變大。 RAC柱抗震性能試驗(yàn)表明，硅粉的摻入，能夠使試件柱的滯回環(huán)面積明顯變小，延性變差，，耗能降低、剛度退化和承載力衰退加快；磚粒的摻加使試件柱的正向承載力有所提高。不管何種摻入料，摻料過高，均會(huì)使延性性能變?nèi)酰瑒偠人p速率加快，脆性增強(qiáng)。
[Abstract]:With the acceleration of urbanization, the accumulation of construction waste has reached an unprecedented height. It has become a hot topic to make recycled concrete from construction waste to achieve waste recycling. Based on this, the recycled aggregate collected by our research group is used to make full use of the properties of silicon powder filling and its activity, toughening and cracking resistance of fiber, and high water absorption rate of brick particles. Based on the properties of brick modified recycled concrete, 11 modified recycled concrete beams with different admixtures and 5 columns with different contents were made, and the properties of beams and columns were tested. The experimental results are as follows: (1) the cube and axial compressive strength and flexural strength of the modified recycled concrete test blocks are carried out with different amount of silica powder and brick particles as the main parameters. The mechanical properties of modified recycled concrete with different admixtures were analyzed. (2) based on the mechanical properties of different admixtures, 11 silicon fumes were designed and manufactured. The concrete beams modified with brick particles were subjected to tri-point loading tests. The load-displacement curves, bearing capacity and deformation of the beams were compared and analyzed. The effects of three kinds of modified materials on the properties of the beams are obtained. (3) based on a practical frame column, five concrete columns modified with silica powder and brick particles are designed by using the 1:2 scaling criterion. The failure law, hysteretic curve, skeleton curve, ductility, stiffness attenuation, energy dissipation and so on are calculated and analyzed, and some conclusions and suggestions for reference are obtained. The results show that the compressive strength of recycled concrete can be enhanced by the addition of silica powder, and the compressive strength and axial compressive strength of the test block can be improved by a small amount of brick particles. At the same time, a small amount of silicon powder can reduce the deflection characteristic value of the beam, appropriate amount of silicon powder can increase the cracking load of recycled concrete beam, a small amount of brick particles can increase the cracking load of recycled concrete beam, and a small amount of brick particles can increase the cracking load of recycled concrete beam. The results show that both yield load and ultimate load decrease in varying degrees, and the amplitude of decrease increases with the increase of the content. The seismic behavior test of RAC column shows that the hysteretic loop area of the specimen column can be obviously reduced by the addition of silica fume. The ductility becomes worse, the energy consumption decreases, the stiffness degenerates and the bearing capacity declines faster, and the positive bearing capacity of the test column is improved by adding brick particles. No matter what kind of admixture is added, the ductility property is weakened, the stiffness attenuation rate is accelerated and the brittleness is enhanced if the admixture is too high.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU37

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本文編號：2053248