灰砂制品的研制

上海地区墙体材料供不应求,仅“粘土砖”每年用量的2/3依靠外地供应。本文介绍利用长江口长兴岛周围含泥量偏高、细度特细的粉砂(细度模数小于0.12)资源,制造灰砂砖,既解决供求矛盾,又能变废为宝,不破坏农田。本文系统研究了长江口粉砂的成分、细度、含泥量、资源分布、蕴藏量等。介绍利用x射线衍射分析、差热分析、电子显微分析等手段,探讨了制品内部水化产物与物理力学性能及配比、工艺参数等相关性。在实验室中测得的小试件耐压强度达到30MPa以上,抗折强度>6MPa,在工厂“中试”试验中,灰砂砖标号在150号以上。本文最后提出了生产灰砂砖的最佳配合比及生产工艺参数。

The Research of "Lime-sand" Products

Shanghai District is far from being self-sufficient in wall-building materials,among which two-thirds of clay bricks are supplied by other regions in recentyears. This paper presents a way to solve this problem by using the local resourceof extra-fine sand (modulus of fineness less than 0.12) with high percentage ofuseful particles setting around Changxing Island in the estuary of Yangtze River(Changjiang) to made lime-sand bricks to meet the vast demand for bricks. Thus,in turning no use sand into treasure, it saves fertile soil for farming. Systematic studies have been made on composition, fineness of particles, usefulsand percentage as well as distribution and reserves of this particular fine sand.Different approaches, such as DFA, SEM and EMP have been adopted to detectthe relationship between the inner hydration effect of product and its physics-mechanic properties, the grading of components and technological parameters.The laboratory tests of the spesimen have found out that its compressive and ben-ding strengthes are greater than 30 MPa and 6 MPa respectively. The mark oflime-sand brick reaches more than 150 in pilot plant test. Finally, this paper gives the optimum ratio of components in making lime-sand brick and its fabrication technological parameters.