| In recent years, with the rapid development of Urban and rural construction, The vast space of demand for building materials has arised. Since the1990s, more and more synthetic polymer resins and construction chemicals have taken the place of traditional building materials in the field of doors and windows, pipe, decoration, building waterproofing, thermal insulation. Chemical building materials have become the fourth largest building materials after steel, wood and cement.Chemical building materials usually refers to new building materials and construction chemicals Mainly composed of synthetic polymer material(all kinds of construction chemicals to ameliorate the performance of materials and construction performance), Mainly Including several categories of products such as building plastic, building coatings, building waterproof sealing materials, insulation materials, building adhesives, concrete admixtures. On the one hand, the chemical building materials can replace the traditional materials such as steel, wood, cement, ceramics, which consume large amount of energy; Mainly Including several categories of products such as building plastic, building coatings, building waterproof sealing materials, insulation materials, building adhesives, concrete admixtures. On the one hand, the chemical building materials can replace the traditional materials such as steel, On the other hand,the production cost of the chemical building materials is less than the production cost of the traditional materials. the chemical building materials have a better cost-effective. Additionally, the chemical building materials have significant advantages in the fields of anti-corrosion、decoration and the service life. Industry can conduce to energy saving、reduction of the consumption of resources and the protection of the ecological environment. Owing to the defects of the polymer material(as hardness, heat resistance, strength, etc), many kinds of mineral material are added to improve the performance,meanwhile, reduce the production cost. Chemical building materials is actually a composite system of mineral materials and polymer materials. The research and development of chemical building materials at home and abroad is mainly focused on use of the product function, physical performance, economic indicators. However, the research of composition, structure and performance changes of chemical building materials is reported seldom after mineral materials added, especially in the research field of the microscopic fabric between mineral material system and chemical building material system.The commonly used chemical building materials in Sichuan Province is the the research object in this paper. The performance of the main varieties of major categories of chemical building materials is researched Systematically. The relationship between added mineral material composition, microscopic fabric and performance of chemical building materials is found out by using modern modern analytical technologies as XRD and SEM, etc. At the same time, According to the process links of all kinds of chemical building materials, The microscopic fabric and performance of mineral materials/chemical building materials syestem is researched by taking a step-by-step sampling(or adding a variety of mineral materials)The main type of chemical building materials,key properties and characteristics are summarized. the classification and function of mineral materials commonly used in the chemical building materials is discussed. The research status and problems about mineral materials and mineral materials/chemical building materials is analyzed, the microscopic fabric and performance of several major kinds of system composed by mineral materials and chemical building materials.In the field of building plastic, the microscopic fabric and performance of system of Calcium carbonate/PVC plastic pipe and Calcium carbonate/PVC plastic window profiles is studied. The result reveals that microscopic fabric of PVC plastic pipe and PVC plastic window profiles with excellent performance show the combination fracture morphology of the mineral material(Calcium carbonate)and the matrix resin is honeycomb, filamentous, flocculent, that the Interface of two phase is indistinct. On the contrary, the system has poor quality.In the field of buliding coatings, the microscopic fabric and performance of several kinds of systems composed of calcined kaolin, mica, barium sulfate, talc, wollastonite and buliding coatings. The result reveals that the performance of the exterior latex paint is affected, especially to the performance of contradistinction and construction,due to the variety of structure and chemical composition of mineral materials. The microscopic fabric of the systems added calcined kaolin, barium sulfate, wollastonite shows that cementation of the mineral materials and the substrate is good, that the mineral material particles can be coated well by the matrix resin, that the colloid shows the filaments characteristic,that the system has good comprehensive performance. The mineral materials with sheet aggregates can endue specific performance to latex paint because of the nature of the mineral materials. For example, parallel and directional array of mica in coatings can endue excellent resistance to aging and high contradistinction. However,the mineral materials need special surface treatment to obtain good overall performance in latex paint.In the field of building waterproof materials, the micro-study of modified asphalt and SBS modified bitumen membrane at home and abroad is mainly concentrated on either Polymer or dispersion of other modified materials in asphalt. The technical means is mostly fluorescence microscopy, TEM,etc. the direct reason of separation phenomenon between asphalt coated cover and fetal base in performance testing is that the modified asphalt does not impregnate through the fetal base and that the middle of the fetal base is empty through SEM technology. The bentonite waterproof material is a kind of special waterproof material that depending on crystal layer adsorption water expansion blocking passageway of crevice water flow. The microscopic fabric of the adsorption water expansion of the bentonite is studied by the SEM technology in this pape The microscopic fabric and performance of acrylic waterproof coating added a variety of mineral materials is studied in this paper. The effect of needle-like wollastonite、flake form illite、granular form of precipitated barium sulfate on acrylic waterproof coating system is analyzed in this paper. The needle-like mineral materials in acrylic waterproof coatings show the function of significant enhancement; The flake form mineral materials in acrylic waterproof coatings produce the function of enhancement to a certain extent, the granular form mineral materials in acrylic waterproof coatings increase the flexibility. The microscopic fabric and performance of polymer cement waterproof coating system, widely used in kitchen and toilet in our country currently,added mineral materials, is researched in this paper. The cementation between cement hydration product and fetal base is good,the colloid is filamentous structure, the toughness is strengthened, the performance of the product is improved overally through adding mineral materials.In the field of materials. The microscopic fabric and performance of glass beads which is widely used in building insulation as inorganic light mineral material in our country,and traditional insulation materials expanded perlite is studied in this paper. The chemical composition of expanded perlite and glass beads is similar. The internal characteristics of expanded perlite and glass beads show the same honeycomb-like structure, because the process of producing expanded perlite and glass beads through perlite is different. the appearance of glass beads approaches spherical particles more. The surface glassy shell becomes more thicken and strong,then leading to the performance difference between two product. The thermal insulating rendering systems made of mortar with mineral binder and using expanding polystyrene granule as aggregate is a commonly used building energy-saving insulation practices. Cement-based mixed with expanded and vitrified small balls is a rising star of thermal insulating rendering systems. The microscopic fabric of the two kinds of thermal insulating product in the form of insulation mortar are compared in this paper:the lightweight aggregate of the two kinds of thermal insulation mortar provides a honeycomb thermal insulating structure. Viewed from the combination between the lighter aggregate and the cement mortar. the vitrified small balls attaches the cement mortar more closely. So that the overall performance of insulation mortar products is improved. |
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