International Journal of Cement Composites and Lightweight Concrete最新文献_第9页

Supplementary cementing materials for concrete 混凝土补充胶凝材料

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90011-5

引用次数: 0

High strength lightweight concrete for use in offshore structures: utilisation of fly ash and silica fume 用于海上结构的高强度轻质混凝土:粉煤灰和硅灰的利用

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90008-5

P.I. Seabrook , H.S. Wilson

{"title":"High strength lightweight concrete for use in offshore structures: utilisation of fly ash and silica fume","authors":"P.I. Seabrook , H.S. Wilson","doi":"10.1016/0262-5075(88)90008-5","DOIUrl":"10.1016/0262-5075(88)90008-5","url":null,"abstract":"<div><p>For many years lightweight portland cement concrete has been available in compressive strength ranges between 30 and 40 MPa. Arctic Island construction demands have fostered technology utilising flowing concrete and have raised design expectations to greater than 45 MPa with dry unit weights of the order of 1900 kg/m<sup>3</sup>.</p><p>This paper presents results of the second phase of a three-phase programme, and consists of 162 trial mixtures using coarse aggregates from three sources, two chemical admixture systems, three levels of fly ash replacement, and three levels of silica fume replacement.</p><p>It is concluded that 91 day compressive strengths of the order of 65 MPa are attainable in lightweight concrete, although this is threshold level of the aggregates. Further, it is concluded that a nominal increase in strength occurs with Type F ash replacement, and that retarded early-strength gain caused by the extended-window superplasticisers poses a potential impediment to early strength. Silica fume additions resulted in significant strength increases. The minimum unit weight achieved was 2000 kg/m<sup>3</sup>.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"10 3","pages":"Pages 183-192"},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(88)90008-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77902806","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

Effective fracture toughness of a marble-epoxy two phase composite 大理岩-环氧两相复合材料的有效断裂韧性

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90005-X

A.K. Sachan , C.V.S. Kameswara Rao

引用次数: 2

Steel-concrete composite structures: stability and strength 钢-混凝土组合结构:稳定性和强度

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90010-3

引用次数: 0

Bond of deformed reinforcing bar embedded in steel fibre reinforced concrete 变形钢筋嵌入钢纤维混凝土中的粘结

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90003-6

F.S. Rostásy , K. Hartwich

引用次数: 17

News: conferences and symposia 新闻:会议和专题讨论会

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90013-9

引用次数: 0

Editorial comment 社论评论

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90001-2

引用次数: 0

Physical, mechanical and durability characteristics of date palm frond stalks as reinforcement in structural concrete 枣椰叶茎在结构混凝土中作钢筋的物理、机械和耐久性特性

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-08-01 DOI: 10.1016/0262-5075(88)90007-3

H.H. Abdel-Rahman , R. Al-Juruf , F. Ahmad , I. Alam

{"title":"Physical, mechanical and durability characteristics of date palm frond stalks as reinforcement in structural concrete","authors":"H.H. Abdel-Rahman , R. Al-Juruf , F. Ahmad , I. Alam","doi":"10.1016/0262-5075(88)90007-3","DOIUrl":"10.1016/0262-5075(88)90007-3","url":null,"abstract":"<div><p>This paper deals with an experimental investigation of the physical and mechanical properties of Date Palm Frond (DPF) stalks and their durability in concrete.</p><p>The study of the physical properties of DPF stalks reported here includes the anatomic structure of the stalk and the effect of water absorption on its volume. Tension tests were used to determine the mechanical properties of the stalks. Test results show that the tensile strength of the stalk walls ranges between 116 to 208 N/mm<sup>2</sup> while that of the core is almost one half of these values. The modulus of elasticity of the stalks is found to range between 10 to 30 kN/mm<sup>2</sup>. Flexural tests carried out on concrete beam specimens reinforced with a single DPF stalk showed that the stalk provided no reinforcing effect due to lack of bond resulting from the tapered nature of the stalk. Chemical tests were designed to examine the durability of DPF stalks in fresh concrete while accelerated tests were designed to investigate the long-term durability of stalks encased in hardened concrete. Results presented in this paper show that the alkaline medium of fresh concrete has no effect on the tensile strength of DPF stalks. They also show that coating DPF stalks with varnish greatly improves their long-term durability in concrete.</p></div>","PeriodicalId":100692,"journal":{"name":"International Journal of Cement Composites and Lightweight Concrete","volume":"10 3","pages":"Pages 175-181"},"PeriodicalIF":0.0,"publicationDate":"1988-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0262-5075(88)90007-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78939138","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: 23

Strength of reinforced keramzite concrete members under combined bending shear and torsion 弯剪扭联合作用下钢筋角化石混凝土构件的强度

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-05-01 DOI: 10.1016/0262-5075(88)90035-8

Shi-Qin Wang , Gu-Yi Kang

引用次数: 1

Short and long term behaviour of ferrocement subjected to uniaxial tension 单轴拉伸作用下钢筋混凝土的短期和长期特性

International Journal of Cement Composites and Lightweight Concrete Pub Date : 1988-05-01 DOI: 10.1016/0262-5075(88)90039-5

B.R. Walkus

引用次数: 1