混凝土
混凝土
혼응토
CONCRETE
2014年
11期
31-33,37
,共4页
喷射混凝土%碳化%施工方式%钢纤维%力学性能
噴射混凝土%碳化%施工方式%鋼纖維%力學性能
분사혼응토%탄화%시공방식%강섬유%역학성능
sprayed concrete%carbonation%shotcrete technology%steel fiber%mechanical property
通过快速碳化试验,探讨了喷射混凝土抗碳化性能和碳化后力学性能变化规律。试验结果表明:喷射混凝土较普通混凝土具有更好的抗碳化性能,其抗压强度、劈拉强度随碳化深度的增加快速提高;掺入钢纤维能进一步提高喷射混凝土碳化性能,减小碳化速率,还能显著提高喷射混凝土碳化后劈拉强度。同时,在分析钢纤维和施工方式对混凝土碳化影响的基础上,建立了喷射混凝土碳化深度模型。
通過快速碳化試驗,探討瞭噴射混凝土抗碳化性能和碳化後力學性能變化規律。試驗結果錶明:噴射混凝土較普通混凝土具有更好的抗碳化性能,其抗壓彊度、劈拉彊度隨碳化深度的增加快速提高;摻入鋼纖維能進一步提高噴射混凝土碳化性能,減小碳化速率,還能顯著提高噴射混凝土碳化後劈拉彊度。同時,在分析鋼纖維和施工方式對混凝土碳化影響的基礎上,建立瞭噴射混凝土碳化深度模型。
통과쾌속탄화시험,탐토료분사혼응토항탄화성능화탄화후역학성능변화규률。시험결과표명:분사혼응토교보통혼응토구유경호적항탄화성능,기항압강도、벽랍강도수탄화심도적증가쾌속제고;참입강섬유능진일보제고분사혼응토탄화성능,감소탄화속솔,환능현저제고분사혼응토탄화후벽랍강도。동시,재분석강섬유화시공방식대혼응토탄화영향적기출상,건립료분사혼응토탄화심도모형。
In order to investigate the carbonation resistance of sprayed concrete and the mechanical property after carbonation ,the accel-erated carbonation test was carried out.The results indicated that the carbonation resistance of sprayed concrete was superior to the normal. With the increasing of carbonation depth,compressive strength and splitting tensile strength of sprayed concrete grew rapidly.The admix-ing of steel fiber can further improve the carbonation resistance,reduce the carbonation rate,and increase the splitting tensile strength of sprayed concrete greatly.Besides,based on analyzing the effects of shotcrete technology and carbonation resistance of steel fiber admixing to sprayed concrete,a carbonation depth model for sprayed concrete was established.