Hydration kinetics, change of relative humidity, and autogenous shrinkage of ultra-high-strength concrete

被引:164
作者
Loukili, A
Khelidj, A
Richard, P
机构
[1] Ecole Cent Nantes, Lab Genie Civil Nantes St Nazaire, F-44321 Nantes 3, France
[2] IUT, F-44606 St Nazaire, France
[3] Direct Sci, F-78061 St Quentin En Yvelines, France
关键词
high-performance concrete; hydration; pore size distribution; humidity; shrinkage;
D O I
10.1016/S0008-8846(99)00022-8
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This research forms part of a vast experimental program designed to investigate the shrinkage and creep of compact reinforced composite (CRC), which is an ultra-high-strength concrete. Tn this paper, only results relating to autogenous shrinkage are presented. While shrinkage deformations were measured, cement hydration, pozzolanic reactions, and pore structure of concrete also were monitored to characterize the microstructural evolution of material. Very high autogenous shrinkage at an early age that stops 10 days after casting was observed. As far as we know, this sudden break in shrinkage kinetics has never been observed before in cement-based materials. The autogenous relative humidity measurements show high self-desiccation within the CRC, A relationship between autogenous shrinkage and self-desiccation of CRC is established and discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:577 / 584
页数:8
相关论文
共 12 条
  • [1] ANDRADE MC, 1996, 4 INT S UT HIGH STRE, P529
  • [2] Bache HH, 1987, 41 CBL, P87
  • [3] Baroghel-Bouny V., 1994, THESIS ECOLE NATL PO
  • [4] Buil M., 1979, 92 LPC
  • [5] CHEYREZY M, 1995, ANN I TECHNIQUE BATI, V532, P103
  • [6] CZERNIN B, 1956, CEMENTKEMI FOR BYGGA
  • [7] SIMULTANEOUS SEMI-ISOTHERMAL METHOD OF THERMOGRAVIMETRY AND DERIVATIVE THERMOGRAVIMETRY, AND ITS APPLICATION TO CEMENT PASTES
    ELJAZAIRI, B
    ILLSTON, JM
    [J]. CEMENT AND CONCRETE RESEARCH, 1977, 7 (03) : 247 - 258
  • [8] Jensen OM, 1996, ACI MATER J, V93, P539
  • [9] LOUKILI A, 1996, THESIS ECOLE CENTRAL
  • [10] SELLEVOLD EJ, 1992, ACI SPECIAL PUBLICAT, P891