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Geopolymer materials based on natural zeolite

机译:基于天然沸石的地聚合物材料

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One of the potential raw materials for preparation of geopolymers is the natural zeolite. In the present report, the used natural zeolite (clinoptilolite) is from huge deposit near Beli Plast, Bulgaria. Geopolymer pastes and mortars are prepared by using three different alkaline activators—sodium hydroxide, sodium silicate and sodium carbonate. The hardened geopolymers are tested for determination of mechanical properties by traditional standardized methods. The structure and the composition of the materials are studied by direct physical methods—X-ray diffraction (XRD), thermal analysis (DTA and TGA) and scanning electron microscopy (SEM). The results show variable degree of dissolutions of the raw zeolite material when using different activators and formation of solid geopolymer materials with qualitatively different structure. Despite its relatively low compressive strength, geopolymers based on natural zeolite cured at room temperature and used as coating, show very good adhesion to concrete.
机译:用于制备地质聚合物的潜在原材料之一是天然沸石。在本报告中,用过的天然沸石(斜发沸石)来自保加利亚Beli Plast附近的巨大矿床。使用三种不同的碱性活化剂(氢氧化钠,硅酸钠和碳酸钠)制备地质聚合物浆料和砂浆。通过传统的标准化方法对硬化的地质聚合物进行测试,以确定其机械性能。通过直接物理方法(X射线衍射(XRD),热分析(DTA和TGA)和扫描电子显微镜(SEM))研究了材料的结构和组成。结果表明,当使用不同的活化剂时,生沸石材料的溶解程度有所不同,并且形成了质构不同的固体地质聚合物材料。尽管其抗压强度较低,但基于天然沸石的天然聚合物在室温下固化并用作涂料,对混凝土具有很好的附着力。

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