發(fā)布時間：2018-06-01 00:53

  本文選題：自密實 + 爐渣��； 參考：《石河子大學》2017年碩士論文

【摘要】：煤炭是我國最重要的能源物資,即使在能源結構發(fā)生巨大變化的今天,煤炭仍占據(jù)66%的能源消耗。煤炭資源被用于支撐社會經(jīng)濟的進步,同時也伴隨著大量工業(yè)廢渣的產(chǎn)生。采用爐渣完全代替砂石而作為混凝土骨料,制備自密實混凝土,一方面保護了環(huán)境,另一方面提高了工業(yè)固體廢棄物的經(jīng)濟價值,做到了變廢為寶。本論文利用水泥、粉煤灰、爐渣、玄武巖纖維和聚羧酸減水劑制備自密實纖維爐渣混凝土,采用單因素與多因素相結合的試驗方法,考慮在不同水膠比、粉煤灰取代率和纖維摻量下自密實玄武巖纖維爐渣混凝土各項性能變化趨勢,得到下列結論:(1)選用單因素試驗研究不同水膠比對自密實爐渣混凝土性能的影響,結果表明:爐渣可以取代普通砂制成自密實輕骨料混凝土,試驗設計的五組不同水膠比所制備的自密實爐渣混凝土具有良好的填充性、抗離析穩(wěn)定性和間隙通過性,其性能可以達到《自密實混凝土應用技術規(guī)程》的要求。試驗的最優(yōu)水膠比為0.42,此時表觀密度為1711.8kg/m3,抗壓強度為12.43MPa,抗折強度為2.4MPa。(2)采用單因素試驗研究不同粉煤灰取代率對自密實爐渣混凝土性能的影響,以不同粉煤灰取代率所制備的五組自密實爐渣混凝土具有較好的填充性、間隙通過性及抗離析穩(wěn)定性,其工作性能均滿足《自密實混凝土應用技術規(guī)程》的要求,摻雜粉煤灰以后混凝土的工作性能有了大幅改善,其中當粉煤灰取代率為70%時,工作性能最優(yōu)。其表觀密度有一定程度下降。在力學性能方面,抗壓強度提升明顯,最高達到21.2MPa。當粉煤灰取代率為70%時,抗折強度達到最大值2.2MPa,此時抗壓強度為16.2MPa。(3)采用單因素試驗研究不同玄武巖纖維摻量對自密實爐渣混凝土性能的影響趨勢,試驗結果表明:纖維摻量為0.5、1.5、2.5kg/m3時,自密實纖維爐渣混凝土的填充性、間隙通過性及抗離析穩(wěn)定性相比普通自密實爐渣混凝土有所下降,但其工作性能仍能滿足《自密實混凝土應用技術規(guī)程》的要求。其中當纖維摻量為1.5kg/m3時,所制備的自密實纖維爐渣混凝土工作性能最優(yōu);表觀密度較普通自密實爐渣混凝土有一定程度下降;在力學性能方面,抗壓強度和抗折強度均先增加后降低,且當纖維摻量為1.5kg/m3時,此時力學性能最優(yōu),抗壓強度為18.6MPa,抗折強度為2.16MPa。(4)采用正交試驗研究不同水膠比、粉煤灰取代率和纖維摻量三個因素共同作用下自密實玄武巖纖維爐渣混凝土性能變化趨勢。結果表明,在三個因素中,水膠比和玄武巖纖維摻量對混凝土拌合物性能影響較為明顯,粉煤灰取代率影響較弱,其中水膠比對T500、表觀密度和抗壓強度影響明顯,纖維摻量對坍落擴展度及抗折強度影響顯著。最終確定的自密實玄武巖纖維爐渣混凝土的最佳配合比為水膠比0.42,粉煤灰取代率70%,玄武巖纖維摻量1.5kg/m3。采用試驗確定的最佳配合比進行了驗證性試驗,試驗結果滿足建筑隔墻條板的性能要求,可用于實際生產(chǎn)之中。
[Abstract]:Coal is the most important energy material in China. Even in today's energy structure, coal still occupies 66% of the energy consumption. Coal resources are used to support the progress of social and economic development. At the same time, it is accompanied by the production of a large number of industrial waste. The slag is used as concrete aggregate instead of sand and concrete, and self compacting concrete is prepared. On the one hand, the environment is protected, on the other hand, the economic value of industrial solid waste has been improved. The paper makes use of cement, fly ash, slag, basalt fiber and polycarboxylic acid water reducing agent to prepare self compacting fiber slag concrete, and the combination of single factor and polyindin is used to consider the different ratio of water to glue and powder. The following conclusions are obtained as follows: (1) the effect of the single factor test on the performance of the self compacting slag concrete is studied by single factor test. The results show that the slag can be replaced by ordinary sand to make self compacting lightweight aggregate concrete and five groups of experimental designs. The self compacting slag concrete prepared with different water and glue ratio has good filling property, resistance to segregation stability and clearance, and its performance can meet the requirements of the application technical specification for "self compacting concrete". The optimum water binder ratio of the test is 0.42, the apparent density is 1711.8kg/m3, the compressive strength is 12.43MPa, and the flexural strength is 2.4MPa. (2). The effect of different fly ash substitution rate on the performance of self compacting slag concrete is studied by single factor test. The five groups of self compacting slag concrete with different fly ash substitution rate have better filling, clearance and anti segregation stability, and their working properties meet the requirements of the application technical regulations of self compacting concrete. The performance of concrete has been greatly improved after the fly ash. When the fly ash substitution rate is 70%, the performance of the concrete is the best. The apparent density decreases to a certain extent. In the mechanical properties, the compressive strength is improved obviously, the maximum to 21.2MPa. when the fly ash substitution rate is 70%, the flexural strength reaches the maximum value of 2.2MPa, and the compression strength is at this time. The strength is 16.2MPa. (3) using single factor test to study the influence trend of different basalt fiber content on the performance of self compacting slag concrete. The test results show that when the fiber content is 0.5,1.5,2.5kg/m3, the filling property of the self compacting fiber slag concrete, the clearance and the anti segregation stability are compared with the ordinary self compacting slag concrete. But its performance can still meet the requirements of the technical specification for the application of self compacting concrete. When the fiber content is 1.5kg/m3, the performance of the self compacting fiber slag concrete is optimal, and the apparent density is lower than that of the ordinary self compacting slag concrete; in the mechanical properties, the compressive strength and the flexural strength of the concrete. When the fiber content is 1.5kg/m3, the mechanical properties are the best, the compressive strength is 18.6MPa, the flexural strength is 2.16MPa. (4), and the orthogonal test is used to study the performance trend of the self compacting basalt fiber slag concrete under the effect of three factors, such as different water glue ratio, fly ash substitution rate and fiber content. In three factors, the effect of water gel ratio and basalt fiber content on the performance of concrete mixture is more obvious, and the effect of fly ash substitution rate is weak. The effect of water glue ratio on T500, apparent density and compressive strength is obvious, and the fiber content has a significant effect on the slump expansion and flexural strength. The optimum mixture ratio of soil to soil is 0.42 of water glue ratio, 70% of the substitution rate of fly ash, and the 1.5kg/m3. of basalt fiber is tested by the optimum mix ratio determined by the test. The test results meet the performance requirements of the building partition bar and can be used in the actual production.
【學位授予單位】：石河子大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU528

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本文編號：1962160