混凝土与水泥制品
混凝土與水泥製品
혼응토여수니제품
CHINA CONCRETE AND CEMENT PRODUCTS
2014年
7期
29-32
,共4页
高性能混凝土%高温%抗压强度%劈拉强度
高性能混凝土%高溫%抗壓彊度%劈拉彊度
고성능혼응토%고온%항압강도%벽랍강도
HPC%High temperature%Compressive strength%Splitting tensile strength
对 C40高性能混凝土(简称 HPC)不同高温作用后,采用自然冷却和喷淋冷却两种方式冷却至常温,研究其抗压强度和劈裂抗拉强度的变化。试验结果表明,两种冷却方式均使 C40高性能混凝土抗压强度及劈拉强度总体呈下降趋势,但自然冷却后,混凝土抗压强度在300℃出现反弹,劈拉强度一致下降;喷淋冷却后,抗压强度和劈裂抗拉强度均一致下降。初步探讨了高温后混凝土性能劣化的机理。
對 C40高性能混凝土(簡稱 HPC)不同高溫作用後,採用自然冷卻和噴淋冷卻兩種方式冷卻至常溫,研究其抗壓彊度和劈裂抗拉彊度的變化。試驗結果錶明,兩種冷卻方式均使 C40高性能混凝土抗壓彊度及劈拉彊度總體呈下降趨勢,但自然冷卻後,混凝土抗壓彊度在300℃齣現反彈,劈拉彊度一緻下降;噴淋冷卻後,抗壓彊度和劈裂抗拉彊度均一緻下降。初步探討瞭高溫後混凝土性能劣化的機理。
대 C40고성능혼응토(간칭 HPC)불동고온작용후,채용자연냉각화분림냉각량충방식냉각지상온,연구기항압강도화벽렬항랍강도적변화。시험결과표명,량충냉각방식균사 C40고성능혼응토항압강도급벽랍강도총체정하강추세,단자연냉각후,혼응토항압강도재300℃출현반탄,벽랍강도일치하강;분림냉각후,항압강도화벽렬항랍강도균일치하강。초보탐토료고온후혼응토성능열화적궤리。
The variation of compressive strength and splitting tensile strength of C40 high performance concrete (HPC) is comparatively studied and discussed, using natural cooling and spray cooling to room temperature after exposed to dif-ferent high temperatures. The test results show that the compressive strength and splitting tensile strength of C40 HPC are totally in downward trend under the two cooling ways after high temperatures, nevertheless, the compressive strength re-cover when naturally cooled after heated to 300℃ . After the spray cooling, compressive strength and splitting tensile strength decline consistently. At the same time, the degradation mechanism of HPC after high temperature is explored.