- 期刊
添加再生細橡膠粉於水泥砂漿力學性質之研究
A Study on the Mechanical Properties of Cement Mortar Add Waste Tire Rubber Powder
摘要
本研究乃針對細橡膠粉作爲再生建材，取三種通過不同篩號細度(﹟30、﹟50、﹟100)及四種添加量（重量比：2.5%、5%、7.5%、10%）的橡膠粉以細骨材重量的百分比取代天然細骨材應用於水泥砂漿中及控制組，探討新拌性質，製成水泥砂漿試體並於不同齡期進行硬固性質、彈性模數、波松比及長度變化率等試驗，以了解廢棄輪胎橡膠粉於水泥砂漿中其適用性及相互關係，進而提升廢輪胎橡膠的價值，達到廢棄物資源化及最大經濟效益。 結果顯示：各配比添加廢輪胎橡膠粉之水泥砂漿凝結時間以及流度皆隨著取代量的增加而延長。添加橡膠粉於水泥砂漿中會導致抗壓強度的降低，而添加﹟50廢輪胎橡膠粉的抗壓強度是三種細度中最高的，主要原因爲橡膠粉末本身的硬度小於一般砂，但含有橡膠粉末的試體在破壞時外觀的裂縫較控制組小。由於橡膠粉對於試體之體積約束性較一般砂弱，因此添加橡膠粉則會提高體積的膨脹率，以RU30R10的試體在91天齡期時膨脹率是控制組的168%，達到0.037%。隨著橡膠粉末的取代量增加，其彈性模數與波松比隨之減少。
並列摘要
In this study, waste tire rubbers powders are used as recycled materials and grinded to pass sieve ﹟30 ﹟50 and ﹟100 by water-jet technology. The powders will be replaced by fine aggregates then added in cement mortar which passed sieve ﹟30, ﹟50 and ﹟100 will be replaced by aggregates for 0%, 2.5%, 5%, 7.5% and 10% by weight to product mortar specimens in order to find the best replacement ratio. Some relevant test such as fresh properties, air content, setting time, some harden and physical tests such as compression strength, bending strength, anti-pulls strength, Poisson's ratio, will tested to realize the applicability and the relationship that waste tire powder added in cement mortar, then to enhance the value of rubber tires and to achieve the best economic efficiency. The results showed that: all the specimens adding rubber powder would extend their setting time and flow. Add rubber powder in cement mortar will result in lower mechanical properties Add the powder rubber tires ﹟50 of the compressive strength of cement mortar is the highest of the three. Add rubber powder will be increased by volume expansion in order to test the ﹟30 replace 10% body in age 91 days when the expansion rate is 168 percent of the control group, reaching 0.037%.The modulus of elasticity and Poisson's Ratio decreased by the raise of replacement.