铁道建筑
鐵道建築
철도건축
RAILWAY ENGINEERING
2015年
1期
141-145
,共5页
矿渣粉%轨枕%芯部温度%抗压强度
礦渣粉%軌枕%芯部溫度%抗壓彊度
광사분%궤침%심부온도%항압강도
Slag powder%Sleeper%Core temperature%Compressive strength
采用对比试验方法研究了预应力轨枕混凝土在掺加15%矿渣粉前后的各项性能，并分析了矿渣粉在蒸养环境下的作用机理。结果表明：在相同蒸汽养护条件下，预应力轨枕混凝土在掺加矿渣粉后，混凝土脱模抗压强度和28 d 抗压强度比基准混凝土分别提高8.8%和12.5%；轨枕芯部温度降低3.4℃，满足规范要求；脱模弹性模量降低4.4%，28 d 弹性模量降低3.6%，轨枕静载抗裂性能得到提高。掺加矿渣粉的高强混凝土各项耐久性能指标均满足规范要求。
採用對比試驗方法研究瞭預應力軌枕混凝土在摻加15%礦渣粉前後的各項性能，併分析瞭礦渣粉在蒸養環境下的作用機理。結果錶明：在相同蒸汽養護條件下，預應力軌枕混凝土在摻加礦渣粉後，混凝土脫模抗壓彊度和28 d 抗壓彊度比基準混凝土分彆提高8.8%和12.5%；軌枕芯部溫度降低3.4℃，滿足規範要求；脫模彈性模量降低4.4%，28 d 彈性模量降低3.6%，軌枕靜載抗裂性能得到提高。摻加礦渣粉的高彊混凝土各項耐久性能指標均滿足規範要求。
채용대비시험방법연구료예응력궤침혼응토재참가15%광사분전후적각항성능，병분석료광사분재증양배경하적작용궤리。결과표명：재상동증기양호조건하，예응력궤침혼응토재참가광사분후，혼응토탈모항압강도화28 d 항압강도비기준혼응토분별제고8.8%화12.5%；궤침심부온도강저3.4℃，만족규범요구；탈모탄성모량강저4.4%，28 d 탄성모량강저3.6%，궤침정재항렬성능득도제고。참가광사분적고강혼응토각항내구성능지표균만족규범요구。
Performance of the prestressing sleeper concrete before and after mixing 15% slag powder was studied by using comparative test,and the action mechanism of slag powders under steam curing environment was analyzed . T he results showed that concrete demolding and 28 d compressive strength increased by 8. 8% and 12. 5%respectively higher than the reference concrete under the same steam curing conditions after mixing slag powder into prestressing sleeper concrete,sleeper core temperature decreased by 3. 4 ℃ which meets the specification requirements,sleeper static load crack resistance is improved with the demolding elastic modulus decreasing by 4. 4%and 28 d elastic modulus decreasing by 3. 6%. Each durability performance index of high strength concrete mixed with slag powder meets the specification requirements.
