【摘要】：無機(jī)聚合物有綠色環(huán)保、快速固化、耐高溫和耐腐蝕等方面的優(yōu)勢(shì)，但同時(shí)它也有收縮率大以及抗碳化能力差的劣勢(shì)。因此，研究如何規(guī)避無機(jī)聚合物混凝土劣勢(shì)的技術(shù)手段具有重要的理論研究?jī)r(jià)值與工程實(shí)踐意義。 本文在大量的試驗(yàn)和理論研究的基礎(chǔ)上，就無機(jī)聚合物混凝土(IPC,inorganic polymer concrete)和無機(jī)聚合物鋼管混凝土(IPCS, inorganic polymerconcrete filled steel tube)進(jìn)行了水化過程、收縮性能和碳化性能研究。最終論證了鋼管約束解決無機(jī)聚合物混凝土碳化明顯的問題，且膨脹劑摻入解決無機(jī)聚合物混凝土收縮大的問題，為提出無機(jī)聚合物鋼管混凝土組合結(jié)構(gòu)提供了理論基礎(chǔ)。 1根據(jù)原材料、膠凝材料和混凝土的微觀結(jié)構(gòu)分析，在分析IPC水化過程中水化熱的基礎(chǔ)上，得出了無機(jī)聚合物混凝土水化機(jī)理、水化產(chǎn)物以及水化放熱曲線。結(jié)果表明，IPC密實(shí)度和膠凝材料質(zhì)量?jī)?yōu)于普通混凝土，同時(shí)摻入膨脹劑后的IPC堿性物質(zhì)增多。 2在試驗(yàn)的基礎(chǔ)上，以膨脹劑摻量為參數(shù)，研究了IPCS水化階段截面測(cè)點(diǎn)的溫度場(chǎng)分布。結(jié)果表明，試件IPCS-6與試件IPCS-0溫度場(chǎng)變化規(guī)律相似，膨脹劑的摻入對(duì)溫度場(chǎng)峰值有一定影響（試件截面處中點(diǎn)在水化過程中溫度峰值IPCS-6比IPCS-0高1.6oC）。 3在試驗(yàn)的基礎(chǔ)上，以膨脹劑摻量為參數(shù)，研究了IPC和IPCS收縮性能。結(jié)果表明，IPCS中核心混凝土相應(yīng)的收縮變形小于IPC，膨脹劑對(duì)其收縮性能有較大影響（試件IPC-8在21d時(shí)收縮率僅有試件IPC-0的1/5左右，試件IPCS-8在21d時(shí)收縮率僅有試件IPCS-0的1/6左右），摻入膨脹劑后的IPCS明顯改善了無機(jī)聚合物混凝土的收縮性能。 4在系統(tǒng)試驗(yàn)和理論分析的基礎(chǔ)上，，以膨脹劑摻量為參數(shù)，研究了IPC和IPCS碳化性能。結(jié)果表明，不同原材料的IPC碳化性能相差較大（試件碳化深度：IPC-0＜IPC-slag/fly ash）；膨脹劑對(duì)其碳化性能有較大影響（試件各個(gè)齡期下的碳化深度：IPC-8＜IPC-6＜IPC-4＜IPC-2＜IPC-0），摻入膨脹劑后的IPC明顯改善了無機(jī)聚合物混凝土的碳化性能。同時(shí)IPCS加速碳化后碳化深度為0mm，論證了IPCS完全解決了無機(jī)聚合物混凝土碳化明顯的問題。
[Abstract]:Inorganic polymers have the advantages of environmental protection, rapid curing, high temperature resistance and corrosion resistance, but they also have the disadvantages of high shrinkage and poor carbonization resistance. Therefore, it has important theoretical research value and engineering practical significance to study how to avoid the disadvantage of inorganic polymer concrete. Based on a large number of experiments and theoretical studies, the hydration process, shrinkage and carbonation properties of inorganic polymer concrete (IPC,inorganic polymer concrete) and inorganic polymer concrete filled steel tube (IPCS, inorganic polymerconcrete filled steel tube) have been studied in this paper. Finally, it is demonstrated that steel pipe restraints solve the obvious problem of inorganic polymer concrete carbonization, and the expansion agent is added to solve the problem of large shrinkage of inorganic polymer concrete. This paper provides a theoretical basis for putting forward the composite structure of concrete filled inorganic polymer steel tubes. 1 according to the microstructure analysis of raw materials, cementitious materials and concrete, the hydration heat in the hydration process of IPC is analyzed. The hydration mechanism, hydration products and hydration heat release curve of inorganic polymer concrete were obtained. The results show that the density of IPC and the quality of cementitious material are better than that of ordinary concrete. At the same time, the alkalinity of IPC is increased after the addition of expansive agent. 2 on the basis of experiment, the quantity of dilatant is taken as the parameter. The temperature field distribution of cross section measurement points in IPCS hydration stage was studied. The results show that the temperature field of IPCS-6 is similar to that of IPCS-0, and the temperature peak value (IPCS-6) at the middle point of the specimen section is higher than that of IPCS-0 in the hydration process. 3 on the basis of the experiment, the temperature field peak value is affected by the addition of expansive agent. The shrinkage properties of IPC and IPCS were studied by using the amount of expansive agent as parameters. The results show that the shrinkage deformation of core concrete in IPCS is smaller than that of IPC, expansion agent, and the shrinkage rate of IPC-8 is only about a fifth of that of IPC-0 at 21d. The shrinkage rate of IPCS-8 was only about 1 / 6 of that of IPCS-0 at 21d. The shrinkage of inorganic polymer concrete was obviously improved by IPCS with dilatant. 4 on the basis of systematic test and theoretical analysis, the content of expansive agent was taken as parameter. The carbonization properties of IPC and IPCS were studied. The results show that the carbonization properties of IPC of different raw materials differ greatly (the carbonation depth of the specimen is IPC-0 < IPC-slag/fly ash);). The carbonation properties of the specimens were greatly affected by the expansive agent (IPC-8 < IPC-6 < IPC-4 < IPC-2 < IPC-0), and the carbonation properties of inorganic polymer concrete were improved obviously by the addition of the expansive agent IPC. At the same time, the carbonation depth of IPCS accelerated carbonization is 0 mm, which proves that IPCS completely solves the obvious problem of inorganic polymer concrete carbonization.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU528

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