http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Jialing Che (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Jialing Che,Ziwei Guo,Quanwei Li,Haifeng Liu 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.12
At present, the exploitation of river sand is forbidden because of the harm to the environment. The production processes of microsilica sand are complicated and the cost is high. The excellent availability of desert sand provides a practical solution for using it as the aggregate, this research used high-volume fly ash, steel fiber, PVA fiber and some or all of the Mu Us desert sand to replace the river sand to prepare the Desert-Sand-based steel-PVA hybrid Fiber Reinforced ECC (H-DSECC) that meets the performance requirements. Through the single factor test, the steel fiber replacement rate and the desert sand replacement rate were taken as the main factors, and the mechanical properties of H-DSECC were initially explored. The results show that the high steel fiber replacement rate or high desert sand replacement rate is not conducive to the realization of strain-hardening. An H-DSECC mixture containing 40% desert sand with W/B ratio of 0.29 has delivered the best properties with the tensile strain capacity of 1.467%, the tensile strength is 7.5 MPa and the cylinder compressive strength is 41.03 MPa at 28 days. Based on the measured stress-strain curves, the uniaxial tension/compression stress-strain curve equations are proposed.
-
Mechanical Performances of Concrete Produced with Desert Sand After Elevated Temperature
Haifeng Liu,Xiaolong Chen,Jialing Che,Ning Liu,Minghu Zhang 한국콘크리트학회 2020 International Journal of Concrete Structures and M Vol.14 No.4
Currently, fire in building is one of the most serious disasters. With the increase of basic construction items in western China, ordinary medium sand resource no longer met with the need of engineering. Compressive strength experiments of concrete produced with desert sand after elevated temperature were carried out in this paper. The effects of desert sand replacement rate (DSRR), temperature and cooling regime on the mechanical performances of concrete produced with desert sand were analyzed. XRD and SEM experiments were also conducted to study the microstructure of concrete produced with desert sand after elevated temperature. Experimental results showed that the cubic compressive strength of concrete produced with desert sand increased firstly, and then declined with temperature. Whereas, the prismatic compressive strength and elasticity modulus of concrete produced with desert sand under static compression declined with temperature. With the enhancement of DSRR, the elasticity modulus under static compression, cubic compressive strength and prismatic compressive strength of concrete produced with desert sand after elevated temperature increased firstly, and then declined, the maximum value of which was reached when DSRR amounted to 40%. Regression models were established to predict the mechanical performances of concrete produced with desert sand after elevated temperature, which were in good agreement with experimental results.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
