DUCTAL(R): AN EXAMPLE OF HOW DURABLE CONCRETE CAN BE!
Improved concrete formulation approaches making use of supplementary cementitiousmaterials, ultra-fine particles and new admixture chemistries has led to amazing progress inconcrete technology over the last twenty years. High-strength concrete was industrialized bythe end of the 80s but basically remained a brittle material requiring the use of passivereinforcement. A technological breakthrough took place in the late 90s, with the developmentof “Ductal(R), an easily castable class of durable, fibre-reinforced concretes offeringcompressive strengths exceeding 200 Mpa and flexural strengths of over 40 Mpa, and alsoexhibiting ductility, allowing it to be used without passive reinforcements in many structuralelements. The mechanical properties of Ductal(R) allow for very slender structures,contributing to overall construction performance by limiting use of raw materials, reducinglabour requirements and improving construction safety. A large program of conventional andnon-conventional durability tests was run on two industrial Ductal(R) mix designs, showingoutstanding results with respect to abrasion, carbonation, chloride and sulphate resistance, aswell as low creep and fatigue. The ultra-high durability of the material significantly reducesthe rate of degradation of structures made with it, lowers maintenance requirements and costs,and increases the total life cycle performance while reducing environmental impact. Ourresults evidence the importance of porosity in durability and confirm that the initialwater/cement ratio is a key factor in controlling the service life of concrete structures.
Paul Acker Mouloud Behloul
Lafarge Cement,Paris,France Lafarge Center of Research,Saint-Quentin FaUavier,France
国际会议
南京
英文
1307-1318
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）