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International Journal of Cement Composites and Lightweight Concrete最新文献

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Moderate strength concrete from lightweight sludge ash aggregates 由轻质污泥灰骨料制成的中等强度混凝土
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-08-01 DOI: 10.1016/0262-5075(89)90091-2
Javed I. Bhatty , K.J. Reid
{"title":"Moderate strength concrete from lightweight sludge ash aggregates","authors":"Javed I. Bhatty ,&nbsp;K.J. Reid","doi":"10.1016/0262-5075(89)90091-2","DOIUrl":"10.1016/0262-5075(89)90091-2","url":null,"abstract":"<div><p>A range of artificial aggregates has been developed from incinerated municipal sludge ash and tested in concrete. The ash is either pelletised or slabbed, and subsequently fired until it sinters and expands to form lightweight products. From the tests conducted on size, grading, bulk density, absorption and compressive strength, it appears that both the pellets and slabs have potential as lightweight aggregates. Their use in producing moderate strength concrete of up to 2000 psi and unit weight 50 lb/cu ft (800 kg/m<sup>3</sup>) via steam curing has specifically been investigated. Although concrete prepared from the pellet form of aggregates are somewhat heavier, they exhibit superior strength than those prepared from the slabs and commercial aggregates derived from expanded clays. It is anticipated that because of their spherical shape and uniform size distribution, the pellets could provide better workability and compaction; and their lower moisture absorption may also render them as potentially better thermal insulators.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 3","pages":"Pages 179-187"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90091-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72731631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 49
International conference on fibre and particleboards bonded with inorganic binders 无机粘合剂粘合纤维和刨花板国际会议
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-08-01 DOI: 10.1016/0262-5075(89)90092-4
M.H. Simatupang
{"title":"International conference on fibre and particleboards bonded with inorganic binders","authors":"M.H. Simatupang","doi":"10.1016/0262-5075(89)90092-4","DOIUrl":"10.1016/0262-5075(89)90092-4","url":null,"abstract":"","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 3","pages":"Pages 189-191"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90092-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91546439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Editorial comment 社论评论
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90116-4
{"title":"Editorial comment","authors":"","doi":"10.1016/0262-5075(89)90116-4","DOIUrl":"https://doi.org/10.1016/0262-5075(89)90116-4","url":null,"abstract":"","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Page 71"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90116-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137228341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The microstructure and ageing of cellulose fibre reinforced autoclaved cement composites 纤维素纤维增强蒸压水泥复合材料的微观结构与老化
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90121-8
A. Bentur , S.A.S. Akers
{"title":"The microstructure and ageing of cellulose fibre reinforced autoclaved cement composites","authors":"A. Bentur ,&nbsp;S.A.S. Akers","doi":"10.1016/0262-5075(89)90121-8","DOIUrl":"10.1016/0262-5075(89)90121-8","url":null,"abstract":"<div><p>The correlations between microstructural changes after ageing and the mechanical performance of autoclaved cellulose-cement composites were studied. The autoclaved composite did not undergo marked microstructural changes during ageing, and this can account for the relatively small changes in mechanical property development during exposure to natural weathering and accelerated ageing tests. In particular autoclaved cellulose cement products indicated significantly less ‘petrification’ of the cellulose fibres with age when compared with normal cured products of similar mix composition [1].</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 111-115"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90121-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72955501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
News: Conferences and symposia 新闻:会议和专题讨论会
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90124-3
{"title":"News: Conferences and symposia","authors":"","doi":"10.1016/0262-5075(89)90124-3","DOIUrl":"https://doi.org/10.1016/0262-5075(89)90124-3","url":null,"abstract":"","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 133-139"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90124-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137227588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Asbestos substitution in the fibre cement industry 石棉在纤维水泥工业中的替代
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90117-6
J.B. Studinka
{"title":"Asbestos substitution in the fibre cement industry","authors":"J.B. Studinka","doi":"10.1016/0262-5075(89)90117-6","DOIUrl":"10.1016/0262-5075(89)90117-6","url":null,"abstract":"<div><p>The present paper gives an introduction to an innovative industrial approach which has, as its main objectives, on the one hand the substitution of asbestos fibres in asbestos cement products, and in parallel on the other hand, the innovation of the respective product range.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 73-78"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90117-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90210658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
Long term durability of PVA reinforcing fibres in a cement matrix 聚乙烯醇增强纤维在水泥基体中的长期耐久性
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90118-8
S.A.S. Akers , J.B. Studinka , P. Meier , M.G. Dobb , D.J. Johnson , J. Hikasa
{"title":"Long term durability of PVA reinforcing fibres in a cement matrix","authors":"S.A.S. Akers ,&nbsp;J.B. Studinka ,&nbsp;P. Meier ,&nbsp;M.G. Dobb ,&nbsp;D.J. Johnson ,&nbsp;J. Hikasa","doi":"10.1016/0262-5075(89)90118-8","DOIUrl":"10.1016/0262-5075(89)90118-8","url":null,"abstract":"<div><p>The long term durability of PVA (polyvinyl alcohol) fibres used as reinforcement in cement-based products has been assessed after exposure of the products to natural weathering and an accelerated ageing process. The PVA fibres were extracted, then characterised by X-ray diffraction techniques. The mechanical properties of the extracted fibres were compared with the mechanical properties of the composite. In general an increase in composite strength and stiffness was evident; this may in part be associated with carbonation of the matrix and increase in the PVA fibre-matrix interfacial bond.</p><p>X-ray diffraction studies on the extracted PVA fibres indicated in some cases a loss of crystalline order with age (natural weathering) related to a disordering of the hydrogen-bonded sheets. The possible changes are minor and have no influence on the tensile properties of the PVA fibres or the ageing properties of the composites.</p><p>It is suggested that PVA fibres which participate in the reinforcement of the cement matrix are durable over a period of at least 7 years, and there is every reason to believe that these fibres will continue to be durable for extended periods.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 79-91"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90118-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78116040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
Micromechanical studies of fresh and weathered fibre cement composites. Part 2: Wet testing 新鲜和风化纤维水泥复合材料的微观力学研究。第2部分:湿测试
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90123-1
R.B. Tait , S.A.S. Akers
{"title":"Micromechanical studies of fresh and weathered fibre cement composites. Part 2: Wet testing","authors":"R.B. Tait ,&nbsp;S.A.S. Akers","doi":"10.1016/0262-5075(89)90123-1","DOIUrl":"https://doi.org/10.1016/0262-5075(89)90123-1","url":null,"abstract":"<div><p>This paper presents a study involving in situ SEM fracture studies of fibre cement composite materials tested in a wet environment. An in situ three point bend loading device coupled with ‘wet cell’ techniques have facilitated the simultaneous loading and observation of micro fracture processes in wet synthetic and cellulose fibre cement composite materials. The micromechanistic fracture behaviour is similar to earlier dry testing in that failure is a complex combination of microcracking, stress redistribution, fibre debonding, fibre pull-out and fibre failure. The onset of the first microcracking stage of this process has been identified as occurring at the limit of proportionality and which develops progressively to the ultimate strength as the tensile zone moves through the thickness of the composite. During ageing due to natural weathering it is believed that there is an increase in interfacial fibre bound which increases the propensity for fibre failure as opposed to fibre pull-out, as observed, and leads to greater strengths in aged products. The extra effect of localised moisture on performance is substantial additional localised microcracking when wet, as well as a small drop in strength. This may be associated with enhanced stress redistribution and more widespread microcrack initiation under wet conditions.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 125-131"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90123-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137227587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Continuing education 继续教育
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90125-5
{"title":"Continuing education","authors":"","doi":"10.1016/0262-5075(89)90125-5","DOIUrl":"https://doi.org/10.1016/0262-5075(89)90125-5","url":null,"abstract":"","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Page 140"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90125-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137228342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The microstructure and ageing of cellulose fibre reinforced cement composites cured in a normal environment 纤维素纤维增强水泥复合材料在正常环境下的微观结构和老化
International Journal of Cement Composites and Lightweight Concrete Pub Date : 1989-05-01 DOI: 10.1016/0262-5075(89)90120-6
A. Bentur , S.A.S. Akers
{"title":"The microstructure and ageing of cellulose fibre reinforced cement composites cured in a normal environment","authors":"A. Bentur ,&nbsp;S.A.S. Akers","doi":"10.1016/0262-5075(89)90120-6","DOIUrl":"10.1016/0262-5075(89)90120-6","url":null,"abstract":"<div><p>The correlations between microstructural changes after ageing and the mechanical performance of cellulose fibre reinforced cement composites were studied. Ageing conditions which promote carbonation (natural ageing and accelerated ageing in a CO<sub>2</sub> rich environment) result in densening of the matrix around the fibres and the petrification of the fibres, leading to an increase in strength and E-modulus. Accelerated ageing in a normal environment leads to densening of the matrix without fibre petrification, resulting in a reduction in strength. Both ageing environments led to a marked reduction in toughness. The processes leading to petrification and matrix densening are discussed with a view of explaining the changes in mechanical properties after ageing.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"11 2","pages":"Pages 99-109"},"PeriodicalIF":0.0,"publicationDate":"1989-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(89)90120-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90571024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 109
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