应用疏浚泥制备透水砖及性能研究

发布时间：2018-01-08 14:04

本文关键词：应用疏浚泥制备透水砖及性能研究　出处：《华南理工大学》2013年硕士论文　论文类型：学位论文

更多相关文章： 疏浚泥 透水砖 抗压强度 透水系数

【摘要】：对河道、港口、湖泊等水域进行疏浚处理所产生废弃物称为疏浚泥，目前我国疏浚泥的处理方法主要为海洋倾倒、填埋和吹填，这些处理方法不仅会对环境带来很大的负面影响，而且也是对资源的浪费，给生态环境及经济的可持续发展带来巨大的压力，不符合可持续发展的理念。陶瓷透水砖作为一种新型城市地面装饰材料，具有良好的透水性和保水性，能有效的缓解城市地表硬化带来的地下水位下降和城市“热岛”效应。本文研究以疏浚泥替代天然粘土原料作为低温黏结剂制备生态透水砖，为疏浚泥的资源化利用提供一条新途径，变废为宝，具有显著的社会效益和推广应用价值。论文对东莞麻涌河及其支流的十个取样点疏浚泥进行了分析测试，表明：东莞麻涌河疏浚泥的主要矿物成分为石英、高岭土和白云母，而其化学组成主要是SiO2、Al2O3、Fe2O3、MgO、K2O、以及有机物等，与普通粘土原料的化学组成相近，且有较好的可塑性，，可以用来替代天然粘土原料作低温黏结剂；另外干疏浚泥有1500kJ/kg左右的发热量，具有一定的能源利用价值。论文研究了疏浚泥、废瓷和玻璃粉的用量对透水砖性能的影响，确定了疏浚泥透水砖的基础配方（wt%）为：疏浚泥25%，废瓷60%，玻璃粉15%。通过正交试验研究了最优工艺条件及该工艺下试样的性能，探讨烧成制度、成型压力和骨料粒径对疏浚泥透水砖的抗压强度和透水系数的影响，烧成温度的升高有利于提高试样的抗压强度，且在1100℃时疏浚泥透水砖透水系数达到极大值；随着保温时间延长、成型压力增大和骨料粒径的逐渐减小，疏浚泥透水砖的抗压强度逐渐增大，而透水系数减小。研究表明：疏浚泥透水砖的最佳工艺条件为烧成温度1100℃，骨料粒径1.00～1.70mm，成型压力10MPa，保温时间20min。试样在最优工艺条件下制备时骨料颗粒表面被玻璃相包裹，试样通过颗粒堆积形成了大量的连通孔并且孔壁光滑，骨料颗粒间通过玻璃相有效的黏结起来，透水砖抗压强度为60MPa，透水系数为6.38×10-2cm/s，重金属溶出量符合行业标准。
[Abstract]:On the river, port, lakes dredging produced waste called dredged mud, the processing method of our country mainly for ocean dumping of dredged mud, landfill and reclamation, these methods will not only bring great negative impact on the environment, but also a waste of resources, bring enormous pressure to sustainable development the ecological environment and economy, is not consistent with the concept of sustainable development. As a new type of permeable ceramic brick city ground decoration materials, with good water permeability and water retention, can effectively alleviate the city surface hardening caused by the decline of groundwater level and city "heat island" effect. This paper studies the dredged mud instead of natural clay as raw material low temperature preparation of binder ecological water permeable brick, provide a new way for resource utilization of dredged mud waste utilization, has significant social benefits and application value.
The ten sampling points of Dongguan Mayong dredging river and its tributaries were analyzed, showed that the main mineral composition of Dongguan river dredging for Machong quartz, kaolinite and muscovite, and its chemical composition is mainly SiO2, Al2O3, Fe2O3, MgO, K2O, and organic matter, chemical raw materials and ordinary clay the similar composition, and good plasticity, can be used instead of natural clay raw materials for low temperature bonding agent; also have a fever dry weight about 1500kJ/kg dredging, has a certain value of energy utilization.
This paper studied the effects of dredged mud, waste porcelain and glass powder content on the properties of water permeable brick, the basic formula of dredged mud permeable brick was determined (wt%): dredging 25%, 60% waste porcelain, glass powder and 15%. were investigated by orthogonal test and the optimum conditions of the process of study sample, burn as a system, the effect of molding pressure and aggregate diameter of dredged mud permeable brick the compressive strength and permeability coefficient, sintering temperature is beneficial to improve the compressive strength of the samples, and the dredging at 1100 DEG C of mud water permeable brick permeability coefficient reaches the maximum value; with the holding time prolonged, molding pressure and aggregate size the compressive strength decreases gradually, dredge water permeable brick is gradually increased, and the permeability coefficient decreases. The results show that: the optimum conditions of dredging water permeable brick for firing temperature of 1100 DEG C, the aggregate size of 1 ~ 1.70mm, forming pressure 10MPa, holding time 20min. samples under the optimum conditions of preparation when the aggregate surface is wrapped in the glass phase, sample particle accumulation formed a hole through a large and smooth hole wall, between the aggregate particles through the glass phase bonding, the compressive strength of pervious brick for 60MPa, the permeability coefficient is 6.38 * 10-2cm/s, the amount of dissolution in accordance with the industry standard heavy metal.

【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ174.76

【参考文献】