需要金幣： 1000 個金幣 |
資料包括：完整論文 |  |
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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：18898 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘 要：通過破碎廢棄混凝土塊制得再生粗細(xì)骨料，添加?；⒅檫@種保溫材料制備再生混凝土保溫砌塊，既可提高再生混凝土利用度，又能解決廢棄混凝土的堆置與環(huán)境污染問題，是混凝土可持續(xù)發(fā)展的重要舉措。試驗研究了再生混凝土保溫砌塊的耐久性。設(shè)計了不同配合比的試塊，對試塊進(jìn)行凍融循環(huán)試驗，以質(zhì)量損失和相對動彈性模量作為主要性能指標(biāo)，并用非接觸法測定再生混凝土早齡期收縮，以收縮值為指標(biāo)，分析再生粗骨料取代率、再生細(xì)骨料取代率、水膠比，?；⒅閾搅康纫蛩貙υ偕炷帘仄鰤K耐久性的影響，運用極差分析法進(jìn)行敏感性分析。結(jié)果表明：經(jīng)25次凍融循環(huán)試驗后，質(zhì)量損失率滿足抗凍性能5%的要求；水膠比、再生粗骨料取代率和玻化微珠摻量是影響再生混凝土耐久性的主要原因。添加?；⒅橹谱髟偕炷帘仄鰤K是可行的，為再生混凝土的可持續(xù)發(fā)展指明新的途徑。 關(guān)鍵詞：再生混凝土；保溫砌塊；耐久性；抗凍性能；收縮變形；?；⒅?/p>
Abstract: Recycled coarse and fine aggregate were made of the broken waste concrete block and glazed hollow bead were used as the insulation material in the recycled concrete insulation block which can improve the Utilization rate of the waste concrete and reduce the stacking of the abandoned concrete to improve environment pollution. Experiment on the durability of the recycled concrete insulation block. Test block were designed with different mix proportion and freeze-thaw cycle test were carried out of quick freezing method which used the mass loss and relative dynamic modulus of elasticity as the main performance index. Non contact method were used to determine the contraction of the recycled concrete at early age which used shrinkage value as index. Analysis durability of recycled concrete insulation block under different recycled aggregate substitution, different water cement ratio,admixture of glazed hollow bead .The results showed that mass loss rate met 5% after 25cycles of freezing and thawing test; Water cement ratio, replacement ratio of recycled coarse aggregate and the admixture of glazed hollow bead are the main influence factors of the durability of recycled aggregate concrete .Adding glazed hollow bead in recycled concrete thermal insulation block is feasible, which point a new way for sustainable developments of the recycled concrete . Key words: Recycled Concrete; Thermal Insulation Block; Durability; Frost Resistance; Shrinkage deformation; Glazed hollow bead |
