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Author

Pierre Richard

Other affiliations: Rhône-Poulenc
Bio: Pierre Richard is an academic researcher from Bouygues. The author has contributed to research in topics: Precipitated silica & Prestressed concrete. The author has an hindex of 10, co-authored 47 publications receiving 1781 citations. Previous affiliations of Pierre Richard include Rhône-Poulenc.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors developed an ultra-high strength ductile concrete designated RPC (Reactive Powder Concrete), which was made possible by the application of a certain number of basic principles relating to the composition, mixing and post set heat curing of the concrete.

1,699 citations

Journal ArticleDOI
TL;DR: In this paper, the shrinkage and creep of compact reinforced composite (CRC) is investigated and a relationship between autogenous shrinkage with self-desiccation is established and discussed.

171 citations

Patent
30 Jun 1994
TL;DR: In this paper, a metal fiber concrete is described, which consists of granular elements of a size at the most equal to 800 micrometers and metal fibers whose length is comprised between 4 and 20 mm. The ratio between the average length of the fibers and the maximum size of the granular elelements being at least equal to 10 and the volume of the metal fibers being comprised between 1.0 and 4.0 % of the concrete volume after setting.
Abstract: The invention relates to a metal fiber concrete. Said concrete is prepared from a composition comprising granular elements of a size at the most equal to 800 micrometers and metal fibers whose length is comprised between 4 and 20 mm. The ratio between the average length of the fibers and the maximum size of the granular elelements being at least equal to 10 and the volume of the metal fibers being comprised between 1.0 and 4.0 % of the concrete volume after setting. The figure shows a curve of the tensile strength of the concrete compared to that of a conventional mortar. The invention aims particularly at producing concrete elements which do not require a conventional metal reinforcement.

36 citations

Patent
30 Jun 1994
TL;DR: A metal fiber concrete composition for molding a concrete element, the composition being essentially constituted by a Portland cement, granular elements, fine elements for pozzolan reaction, metal fibers, a dispersing agent, optionally other additives, and water.
Abstract: A metal fiber concrete composition for molding a concrete element, the composition being essentially constituted by a Portland cement, granular elements, fine elements for pozzolan reaction, metal fibers, a dispersing agent, optionally other additives, and water. The preponderant granular elements have a maximum grain size D of not more than 800 micrometers. The preponderant metal fibers have individual lengths 1 lying in the range 4 mm to 20 mm. The ratio R of the mean length L of the fibers divided by said maximum size D of the granular elements is not less than 10. The amount of preponderant metal fibers is such that the volume of preponderant metal fibers lies in the range 1.0% to 4% of the volume of the concrete after setting.

25 citations

Patent
12 Jun 1992
TL;DR: In this paper, a mortar of very high performance is obtained by mixing with water a mixture which comprises a Portland cement, a vitreous microsilica obtained as byproduct in the zirconium industry, a superplasticising agent and/or a wetting agent, a quarry sand, optionally other adjuvants, in the proportions shown.
Abstract: Mortar of very high performance. This mortar is obtained by mixing with water a mixture which comprises a Portland cement, a vitreous microsilica obtained as byproduct in the zirconium industry, a superplasticising agent and/or a wetting agent, a quarry sand, optionally other adjuvants, in the proportions shown. The invention makes it possible in particular to obtain mortars which have a crushing strength of the order of 250 MPa and to prepare concrete of very high performance.

23 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the utilization of fly ash in construction, as a low-cost adsorbent for the removal of organic compounds, flue gas and metals, light weight aggregate, mine back fill, road sub-base, and zeolite synthesis is discussed.

2,117 citations

Journal ArticleDOI
Sidney Diamond1
TL;DR: In this article, the conditions that must be met for MIP measurements to provide valid estimates of the pore size distribution of porous solids are reviewed and evidence is presented indicating that these conditions are not satisfied in cement-based systems.

1,017 citations

Journal ArticleDOI
Caijun Shi1, Zemei Wu1, Jianfan Xiao1, Dehui Wang1, Zhengyu Huang1, Zhi Fang1 
TL;DR: In this article, the theoretical principles, raw materials, mixture design methods, and preparation techniques for UHPC are reviewed, including reduction in porosity, improvement in microstructure, enhancement in homogeneity, and increase in toughness.

699 citations

Journal ArticleDOI
TL;DR: In this article, the authors addressed the mix design and properties assessment of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) by employing the modified Andreasen & Andersen particle packing model.

615 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of binder systems containing different levels of silica fume on fresh and mechanical properties of concrete were investigated, and the results indicated that as the proportion of fume increased, the workability of concrete decreased but its short-term mechanical properties such as 28-day compressive strength and secant modulus improved.
Abstract: This paper presents the results of experimental work on short- and long-term mechanical properties of high-strength concrete containing different levels of silica fume. The aim of the study was to investigate the effects of binder systems containing different levels of silica fume on fresh and mechanical properties of concrete. The work focused on concrete mixes having a fixed water/binder ratio of 0.35 and a constant total binder content of 500 kg/m3. The percentages of silica fume that replaced cement in this research were: 0%, 6%, 10% and 15%. Apart from measuring the workability of fresh concrete, the mechanical properties evaluated were: development of compressive strength; secant modulus of elasticity; strain due to creep, shrinkage, swelling and moisture movement. The results of this research indicate that as the proportion of silica fume increased, the workability of concrete decreased but its short-term mechanical properties such as 28-day compressive strength and secant modulus improved. Also the percentages of silica fume replacement did not have a significant influence on total shrinkage; however, the autogenous shrinkage of concrete increased as the amount of silica fume increased. Moreover, the basic creep of concrete decreased at higher silica fume replacement levels. Drying creep (total creep − basic creep) of specimens was negligible in this investigation. The results of swelling tests after shrinkage and creep indicate that increasing the proportion of silica fume lowered the amount of expansion. Because the existing models for predicting creep and shrinkage were inaccurate for high-strength concrete containing silica fume, alternative prediction models are presented here.

531 citations