CAJ | 학술논문

以C30混凝土为基准,选用16目、20目、40目三种粒径废旧轮胎橡胶粉等体积取代粗细骨料制备橡胶混凝土,研究胶粉粒径、掺量对橡胶混凝土28d后的平均渗水高度、相对渗水系数的影响。结果表明,掺入橡胶粉后,混凝土拌合物流动性减弱,孔隙率减小；16目胶粉混凝土的渗水高度和相对渗透系数随胶粉掺量呈现先低再高再低的变化,20目、40目胶粉橡胶混凝土波动变化小；胶粉掺量小于125L时,三种胶粉制备的混凝土,相对渗透系数均小于基准混凝土,到125L时,相对渗透系数趋于一致；综合橡胶混凝土28d抗压强度和抗渗性能表现,橡胶粉的掺量宜控制在100L以内,最佳粒径为20目和40目。
이C30혼응토위기준,선용16목、20목、40목삼충립경폐구륜태상효분등체적취대조세골료제비상효혼응토,연구효분립경、참량대상효혼응토28d후적평균삼수고도、상대삼수계수적영향。결과표명,참입상효분후,혼응토반합물류동성감약,공극솔감소；16목효분혼응토적삼수고도화상대삼투계수수효분참량정현선저재고재저적변화,20목、40목효분상효혼응토파동변화소；효분참량소우125L시,삼충효분제비적혼응토,상대삼투계수균소우기준혼응토,도125L시,상대삼투계수추우일치；종합상효혼응토28d항압강도화항삼성능표현,상효분적참량의공제재100L이내,최가립경위20목화40목。
Using C30 concrete as a standard, rubber concrete is prepared by waste scrap rubber powder with three particle size of 16 mesh, 20 mesh and 40 mesh scrapped which is replaced in same volume. The influence of powder par-ticle size and dosage on average water penetration height and relative permeability coefficients for rubber concrete after 28 days later is investigated. The results show that, the fluent of fresh concrete decreases and porosity reduces by adding rub-ber powder; by adding dosage of powder, water penetration height of concrete with 16 mesh powder and relative perme-ability coefficients decrease first then increase at last decrease, while 20 mesh and 40 mesh varies between a small range;when dosage of powder is less than 125 liter, relative permeability coefficient of rubber concrete mixed with three kinds of powder is less than reference concrete. Relative permeability coefficient of rubber concrete comes consistent up to 125 liter dosage. Compressive strength and permeability of rubber concrete in 28 day are synthesized, the content of rubber powder is controlled by 100 liter, best diameter is 20 mesh and 40 mesh.