水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2014年
5期
13-17
,共5页
PVA纤维%掺量%混凝土%凝结时间%干缩性能
PVA纖維%摻量%混凝土%凝結時間%榦縮性能
PVA섬유%참량%혼응토%응결시간%간축성능
PVA fiber%incorporation%concrete%setting time%dry shrinkage performance
混凝土的开裂问题已成为目前工程界的热点和难点问题。随着混凝土强度的提高，混凝土结构开裂问题越来越明显。为了克服上述缺点，简单、易行的办法是掺纤维。通过在混凝土中加入不同产品种类，不同计量的PVA纤维后，以对比试验的方法，对混凝土的用水量和凝结时间，收缩性能做了深入研究，分析了各指标的基本变化规律，得出随着掺入PVA纤维量的增大，用水量增加，凝结时间延长，收缩加大，同时阐明了作用机理，进一步探明了掺PVA纤维混凝土的应用性能，为工程施工提供了理论依据。
混凝土的開裂問題已成為目前工程界的熱點和難點問題。隨著混凝土彊度的提高，混凝土結構開裂問題越來越明顯。為瞭剋服上述缺點，簡單、易行的辦法是摻纖維。通過在混凝土中加入不同產品種類，不同計量的PVA纖維後，以對比試驗的方法，對混凝土的用水量和凝結時間，收縮性能做瞭深入研究，分析瞭各指標的基本變化規律，得齣隨著摻入PVA纖維量的增大，用水量增加，凝結時間延長，收縮加大，同時闡明瞭作用機理，進一步探明瞭摻PVA纖維混凝土的應用性能，為工程施工提供瞭理論依據。
혼응토적개렬문제이성위목전공정계적열점화난점문제。수착혼응토강도적제고，혼응토결구개렬문제월래월명현。위료극복상술결점，간단、역행적판법시참섬유。통과재혼응토중가입불동산품충류，불동계량적PVA섬유후，이대비시험적방법，대혼응토적용수량화응결시간，수축성능주료심입연구，분석료각지표적기본변화규률，득출수착참입PVA섬유량적증대，용수량증가，응결시간연장，수축가대，동시천명료작용궤리，진일보탐명료참PVA섬유혼응토적응용성능，위공정시공제공료이론의거。
At present ,cracking of concrete has become a heated and difficult issue in engineering field .With the im-provement of concrete strength ,cracking of concrete structures becomes more and more severe .In order to overcome the above disadvantages ,the most simple and easy way is to add fiber to concrete .Here ,by adding different products and measurements of PVA fiber ,the water consumption ,setting time and shrinkage of the concrete were studied through com-parison tests;the basic regularity of each index was analyzed .The results showed that with the increase of the incorpora-tion of PVA fiber content , the water consumption and shrinkage increased , setting time prolonged . Meanwhile , the mechanism was explained which furtherly proved the excellent performance of PVA fiber concrete .This study will provide theoretical support for engineering constructions .
