掺矿渣粉混凝土的架构理论研究

发布时间：2018-02-12 01:15

本文关键词： 架构理论矿物掺合料配合比耐久性　出处：《大连理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：混凝土架构模型是由王立久教授提出的具有重大意义的混凝土研究理论,该理论指出,混凝土中的粗集料在搅拌、振捣及重力作用下,按一定的当量配位最紧密堆积而形成混凝土的主要骨架,并用一定砂灰比的砂浆来填充粗集料空隙,进而胶结龛固混凝土的粗集料,形成了具有一定的强度特性的混凝土结构模型。混凝土架构模型和传统混凝土水泥石模型一样,都是一种研究混凝土基本理论的方式方法。在传统混凝土水泥石模型中,它突出了水灰比参数对混凝土强度的贡献,而在混凝土架构模型中,则强调砂浆比、砂灰比及水胶比对混凝土强度的综合作用,强调粗集料架构对混凝土强度贡献。本文以混凝土的架构理论为研究基点,进行了掺入矿物掺合料之后的混凝土的架构特性研究,具体研究内容包括以下几方面： 1.对比传统混凝土水泥石模型理论与王立久教授的混凝土架构模型理论,总结归纳混凝土架构理论的特点和要义,点明混凝土的粗集料架构层、水泥砂浆层和界面过渡层的三圆结构,强调了粗集料的骨架和体积稳定性增强作用。 2.从传统混凝土入手,选择不同最大粒径,不同空隙率的碎石集料,得到混凝土和相应砂浆强度,利用公式fcu=Pgfm+(1-Pg)·fg,计算掺入矿粉混凝土的粗集料架构贡献强度,进而完成以砂灰比、单位用水量和砂浆比为基本参数的掺矿粉架构混凝土配合比的设计,得到掺矿粉混凝土的架构配比设计和具体计算过程。 3.对比架构与普通混凝土的力学性能,分别使用传统规范的配合比设计方法和架构混凝土配合比设计方法,分析两种模型下的混凝土的强度性能差异。并从水泥使用量的角度比较两种模型下的配合比差异,分析架构混凝土的经济价值,结合最终获得的硬化混凝土的强度值考虑其使用性能。 4.研究架构混凝士的耐久性,选用了抗冻性、抗渗性和抗碳化性的标准试验方法,对比架构混凝土与普通混凝土的抗冻性、抗渗性和抗碳化性能情况,并讨论架构混凝土的实际使用价值,验证混凝土架构模型有着与传统混凝土模型相当的性能及更优越的经济性。 5.着重考虑矿物掺合料对架构作用的影响,分析单掺30%矿粉和复掺15%粉煤灰和15%矿粉的混凝土的性能。分析有无掺合料及不同掺合料情况下混凝土架构性能,证明在有掺合料存在的情况下,混凝上架构理论依然成立,并具有更优良的性能。
[Abstract]:The concrete structure model is a significant concrete research theory put forward by Professor Wang Lijiu, which points out that the coarse aggregate in concrete is stirred, vibrated and gravity. The main skeleton of concrete is formed according to the compactness of the coordination position of a certain equivalent, and the coarse aggregate void is filled with mortar with a certain ratio of sand to cement, and then the coarse aggregate of concrete is cemented. The concrete structure model with certain strength characteristic is formed. The concrete frame model is a kind of method to study the basic theory of concrete, just like the traditional concrete cement stone model. In the traditional concrete cement stone model, It highlights the contribution of water-cement ratio parameters to concrete strength, while in the concrete frame model, it emphasizes the comprehensive effect of mortar ratio, sand cement ratio and water-binder ratio, and emphasizes the contribution of coarse aggregate structure to concrete strength. Based on the structure theory of concrete, this paper studies the structure characteristics of concrete mixed with mineral admixture. The specific research contents include the following aspects:. 1.Compared with the traditional concrete cement stone model theory and Professor Wang Lijiu's concrete frame model theory, the characteristics and essentials of the concrete structure theory are summarized, and the coarse aggregate structure layer of concrete is pointed out. The three-circle structure of cement mortar layer and interfacial transition layer emphasizes the enhancement of skeleton and volume stability of coarse aggregate. 2. Starting from the traditional concrete, the aggregate with different maximum particle size and different porosity is selected, and the strength of concrete and corresponding mortar is obtained. The contribution strength of coarse aggregate structure mixed with mineral powder concrete is calculated by using the formula fcu=Pgfm 1-Pg) 路FG. Furthermore, the design of the mix ratio of the structure concrete mixed with mineral powder with sand / cement ratio, unit water consumption and mortar ratio as the basic parameters is completed, and the concrete calculation process and the design of the structure proportion of the mixed mineral powder concrete are obtained. 3. Comparing the mechanical properties of the frame with the ordinary concrete, the traditional design method of mix proportion and the design method of concrete mix proportion of the frame are used respectively. This paper analyzes the difference of strength performance of concrete under two models, and compares the difference of mix ratio between the two models from the point of view of cement usage, and analyzes the economic value of concrete structure. Combined with the ultimate strength of hardened concrete to consider its performance. 4. The durability of the structure coagulant is studied. The standard test methods of frost resistance, impermeability and carbonation resistance are selected, and the frost resistance, impermeability and carbonation resistance of the concrete are compared. The practical value of frame concrete is discussed, and it is verified that the concrete frame model has the same performance and superior economy as the traditional concrete model. 5. Considering the influence of mineral admixture on the structure function, the properties of concrete with only 30% mineral powder and 15% fly ash and 15% mineral powder are analyzed, and the properties of concrete structure with or without mineral admixture and with different admixtures are analyzed. It is proved that in the presence of admixtures, the theory of coagulation architecture is still valid and has better performance.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU528.2

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