CAJ | 학술논문

水泥基材料的抗开裂性能对于工程结构的安全性和耐久性至关重要。采用单一圆环法和组合圆环法研究了橡胶集料对水泥净浆抗开裂性能的影响。结果表明，随着橡胶积极掺量的增加，两种试验中圆环试件的开裂时间显著延长。而且，还发现在组合圆环试验中试件的开裂位置均发生在不掺加橡胶集料的区间范围内。分析表明，橡胶集料的加入不仅降低了材料的弹性模量，还增加了截面断裂时的耗能能力，这使得含有橡胶集料截面的抗开裂性能得以提高。
수니기재료적항개렬성능대우공정결구적안전성화내구성지관중요。채용단일원배법화조합원배법연구료상효집료대수니정장항개렬성능적영향。결과표명，수착상효적겁참량적증가，량충시험중원배시건적개렬시간현저연장。이차，환발현재조합원배시험중시건적개렬위치균발생재불참가상효집료적구간범위내。분석표명，상효집료적가입불부강저료재료적탄성모량，환증가료절면단렬시적모능능력，저사득함유상효집료절면적항개렬성능득이제고。
Cracking resistance of cement based materials is critical for safety and durability of engineering structures.The influence of waste crumb rubber on the cracking resistance of cement paste specimens was investigated using single ring test and composite ring test. The results show that when crumb rubber is added,the cracking time of the specimens is delayed significantly in both two types of tests.In composite ring test,cracking always occurs in the segment of the specimen where crumb rubber is not added.The main reasons for the im-proved cracking resistance of the specimen can be attributed to the facts that the addition of crumb rubber decreases the elastic modulus of the specimen and improves the energy absorption of the sections.