混凝土
混凝土
혼응토
CONCRETE
2014年
2期
75-78
,共4页
段晓牧%夏军武%曹极昌%杨风州
段曉牧%夏軍武%曹極昌%楊風州
단효목%하군무%조겁창%양풍주
煤矸石%集料%水泥基材料%高温水养护
煤矸石%集料%水泥基材料%高溫水養護
매안석%집료%수니기재료%고온수양호
coal gangue%aggregate%cement-based material%high-temperature-water curing
选用自燃(活性)和非自燃(非活性)煤矸石作为粗、细集料,研究标准养护和高温水养护条件下两种矸石集料-水泥基材料力学性能的发展规律,为解决煤矸石集料在水泥混凝土中的应用提供依据。试验结果表明:对于煤矸石细集料-水泥浆体而言,高温水养护条件下,有利于提高两种矸石细集料-水泥基材料早期(3、7d)的抗压强度,但对矸石细集料-水泥基材料的后期抗压强度的发展会产生高温负效应,但是对抗折强度的影响正好相反;对于煤矸石集料混凝土,高温水养护对其力学性能发的展是有利的,特别是对自燃矸石集料混凝土,高温水养护能够在一定程度上激发其火山灰活性,对其强度的发展有利,并不会产生“高温负效应”。
選用自燃(活性)和非自燃(非活性)煤矸石作為粗、細集料,研究標準養護和高溫水養護條件下兩種矸石集料-水泥基材料力學性能的髮展規律,為解決煤矸石集料在水泥混凝土中的應用提供依據。試驗結果錶明:對于煤矸石細集料-水泥漿體而言,高溫水養護條件下,有利于提高兩種矸石細集料-水泥基材料早期(3、7d)的抗壓彊度,但對矸石細集料-水泥基材料的後期抗壓彊度的髮展會產生高溫負效應,但是對抗摺彊度的影響正好相反;對于煤矸石集料混凝土,高溫水養護對其力學性能髮的展是有利的,特彆是對自燃矸石集料混凝土,高溫水養護能夠在一定程度上激髮其火山灰活性,對其彊度的髮展有利,併不會產生“高溫負效應”。
선용자연(활성)화비자연(비활성)매안석작위조、세집료,연구표준양호화고온수양호조건하량충안석집료-수니기재료역학성능적발전규률,위해결매안석집료재수니혼응토중적응용제공의거。시험결과표명:대우매안석세집료-수니장체이언,고온수양호조건하,유리우제고량충안석세집료-수니기재료조기(3、7d)적항압강도,단대안석세집료-수니기재료적후기항압강도적발전회산생고온부효응,단시대항절강도적영향정호상반;대우매안석집료혼응토,고온수양호대기역학성능발적전시유리적,특별시대자연안석집료혼응토,고온수양호능구재일정정도상격발기화산회활성,대기강도적발전유리,병불회산생“고온부효응”。
It selected spontaneous combustion(active) and non-spontaneous combustion(inactive) two kinds of coal gangues as concrete aggregates,the development trend of mechanical properties of coal gangue aggregates-cement-based materials under the standard curing and high-temperature-water curing conditions were observed,the results can provided the basis of application on the coal gangue as con-crete aggregates.Results of the trial indicated that for the coal gangue as fine aggregates-cement-based materials ,under the high-tem pera-ture-water curing,could improved the early (3,7 d) compressive strength,but it could generated the negative effect in the later period under the high temperature curing,however,the impact on the concrete flexural strength were opposite;for the coal gangue aggregates concrete,the high-temperature-water curing was beneficial to the mechanical properties of concrete,especially to the spontaneous combustion gangues concrete,because the high-temperature-water curing could stimulated the gangues activity,and hadn't generated the negative effect.