STRAIN-RATE SENSITIVE BEHAVIOR OF CEMENT PASTE AND MORTAR IN COMPRESSION

The strain-rate sensitivity of the cement paste and mortar constituents of concrete is studied experimentally. Saturated cement paste and mortar specimens are loaded in compression to 15,000 microstrains, 27 to 29 days after casting, using strain rates ranging from 0.3 to 300,000 microstrains/sec. Water-cement ratios of 0.3, 0.4, and 0.5 are used. Strain-rate sensitivity of the material is measured in terms of the initial elastic moduli, maximum stress, and corresponding strain. The initial elastic moduli and the strength of cement paste and mortar increase by 7% and 15%, respectively, with each order of magnitude increase in strain rate. The strain at the maximum stress is the greatest for the lowest strain rate. With an increase in strain rate, the strain at the maximum stress first decreases and then increases.

[1]  H. W. Reinhardt,et al.  Stress-strain behaviour of concrete and mortar at high rates of tensile loading , 1982 .

[2]  T. Hatano,et al.  DYNAMICAL COMPRESSIVE DEFORMATION AND FAILURE OF CONCRETE UNDER EARTHQUAKE LOAD , 1960 .

[3]  R H Evans,et al.  EFFECT OF RATE OF LOADING ON THE MECHANICAL PROPERTIES OF SOME MATERIALS. , 1942 .

[4]  E. Sellevold,et al.  Ice Formation in Hardened Cement Paste—1. Mature Water-Saturated Pastes , 1980 .

[5]  Tai Te Wu,et al.  The effect of inclusion shape on the elastic moduli of a two-phase material* , 1966 .

[6]  H. Furr,et al.  STRENGTH AND ENERGY ABSORPTION CAPABILITIES OF PLAIN CONCRETE UNDER DYNAMIC AND STATIC LOADINGS , 1967 .

[7]  Surendra P. Shah,et al.  CONSTITUTIVE MODEL FOR CONCRETE UNDER DYNAMIC LOADING. , 1983 .

[8]  O. C. Zienkiewicz,et al.  Constitutive model for concrete under dynamic loading , 1983 .

[9]  F. H. Wittmann,et al.  Variablility and Mean Value of Strength of Concrete as Function of Load , 1980 .

[10]  Surendra P. Shah,et al.  Constitutive Model for Dynamic Loading of Concrete , 1985 .

[11]  Cyril M. Harris,et al.  Shock and vibration handbook , 1976 .

[12]  F. H. Wittmann,et al.  Fracture mechanics of concrete , 1983 .

[13]  Antoine E. Naaman,et al.  EFFECT OF STRAIN-RATE ON THE PULL-OUT BEHAVIOUR OF FIBRES IN MORTAR , 1981 .

[14]  J. Takeda,et al.  DEFORMATION AND FRACTURE OF CONCRETE SUBJECTED TO DYNAMIC LOAD , 1972 .

[15]  R. Zimmerman.  Elastic moduli of a solid with spherical pores: New self-consistent method , 1984 .

[16]  Zdenek P. Bazant,et al.  ADVANCES IN DEFORMATION AND FAILURE MODELS FOR CONCRETE. , 1981 .

[17]  G. Plauk.  Concrete structures under impact and impulsive loading , 1982 .

[18]  Surendra P. Shah,et al.  Properties of Concrete Subjected to Impact , 1983 .

[19]  N. Oshima,et al.  A Method to Calculate Effective Modulus of Hybrid Composite Materials , 1985 .

[20]  Surendra P. Shah,et al.  Behavior of Hoop Confined Concrete Under High Strain Rates , 1985 .

[21]  D. C. Spooner,et al.  The stress-strain relationship for hardened cement pastes in compression , 1972 .

[22]  Z. Hashin.  Analysis of Composite Materials—A Survey , 1983 .

[23]  Surendra P. Shah,et al.  Rate-sensitive damage theory for brittle solids , 1984 .

[24]  W. Struck,et al.  Examples of impact and impulsive loading in the field of civil engineering , 1975 .

[25]  Arthur H. Nilson,et al.  PROPERTIES OF HIGH - STRENGTH CONCRETE SUBJECT TO SHORT - TERM LOADS , 1981 .

[26]  Walter H. Price,et al.  Factors influencing concrete strength , 1950, Materiales de Construcción.

[27]  R. K. Dhir,et al.  A study of the relationships between time, strength, deformation and fracture of plain concrete , 1972 .

[28]  Comité euro-international du béton,et al.  Concrete structures under impact and impulsive loading : RILEM-CEB-IABSE-IASS--interassociation symposium : Berlin (West), June 2-4, 1982 : introductory report , 1982 .

[29]  Surendra P. Shah,et al.  INELASTIC BEHAVIOR AND FRACTURE OF CONCRETE , 1966 .

[30]  L. E. Malvern,et al.  Dynamic Compressive Testing of Concrete and Mortar , 1984 .

[31]  D. Watstein.  Effect of Straining Rate on the Compressive Strength and Elastic Properties of Concrete , 1953 .

[32]  H. Rusch.  Researches Toward a General Flexural Theory for Structural Concrete , 1960 .

[33]  P. R. Sparks,et al.  The effect of rate of loading upon the static and fatigue strengths of plain concrete in compression , 1973 .

[34]  G. Arfken.  Mathematical Methods for Physicists , 1967 .

[35]  B. Budiansky,et al.  Elastic moduli of a cracked solid , 1976 .

[36]  E. A. Dean.  Elastic Moduli of Porous Sintered Materials as Modeled by a Variable‐Aspect‐Ratio Self‐Consistent Oblate‐Spheroidal‐Inclusion Theory , 1983 .

[37]  David Darwin,et al.  Submicrocracking in Cement Paste and Mortar , 1987 .

[38]  R. Hill.  The Elastic Behaviour of a Crystalline Aggregate , 1952 .

[39]  W. Dilger,et al.  Ductility of Plain and Confined Concrete Under Different Strain Rates , 1984 .