Prediction and assessment of concrete properties from pulse-velocity tests

1757 PUP~ISSs JA KINGS COLL. LONDONs GB Apparatus for compression tests on concrete at high tm~perat~res. 8F,8R. MAG. CONCP~TE RES.V25, N83, JUNE, 19q3, PI03-I08 • 1758 CARMICHAEL, GD C.E.G.B.~ NUC. LABS. GLOUCS. GB HORNBY, IW C.E. G. B. RES. LABS. LEATKEHKEADs GB The strain behavio~r of comerete in prestressed concrete presst~e vessels. 14F, 2T,32R. MAG. CONCRETE RES.V25, N82,MAR. 1973, P5-16. 1759 UPPALs JY UNIVERSITY COLLEGE, LONDONs GB Am instability theory of failure for concrete. 9F,

llR. NAG. CONCRETE REs. V2~, N82, MAR. 1973 ,P21-30. A simple math~natlcal model s in which the failure of concrete under unisxial ccmpression is attributed to the instability which develops in the macroelemental structure formed by cracking, is presented. This model predicts a critical fracture lez~th dependent upon speci ~ men size and lo~gitmdinal stress gradient. The model predictions sre compared with experimental data. 1760 NWOKOYE, DN Prediction and a s s e s ~ n ~ of concrete properties fr~n pttlse-velocity tests. 6F,31R. MAG. C O ~ RES .V25,N82, MAR. 1973, P39-~6.