Civil

Age at Test
(Days) Date Tested Air Cured Cubes Water Cured Cubes Water Cured Cylinder SSD Mass
(kg) Ultimate Load
(kN) Compressive Strength
(N/mm2) SSD Mass
(kg) Ultimate Load
(kN) Compressive Strength
(N/mm2) SSD Mass
(kg) Ultimate Load
(kN) Compressive Strength
(N/mm2)
7 17 Jan 2.210 313.0 31.30 2.268 334.0 33.40
21 31 Jan 2.270 374.0 37.40 2.270 451.3 45.13
55 5 Mar 2.290 498.6 49.86 2.356 462.2 46.22 12.198 542.3 30.69

Age at Test
(Days) Reading Air Cured Prism Water Cured Prism SSD Mass
(kg) ERUDITE Resonant Frequency
(Hz) PUNDIT Transit Time
(x10-6 sec) SSD Mass
(kg) ERUDITE Resonant Frequency
(Hz) PUNDIT Transit Time
(x10-6 sec)
7 1 10.94 3000 119.4 11.43 3045 118.9 2 3000 119.2 3495 119.2 3 3000 119.6 4490 117.8
21 1 10.92 3230 124.9 11.45 3790 114.4 2 3110 128.8 3245 114.5 3 3292 124.8 3590 114.4
55 1 10.91 4075 122.7 11.47 4275 117.0 2 3735 3860 3 3615 3280 4 3295 3670

PUNDIT test ;
E_(c(t))= ρ V^2 ((1+v) (1-2v))/((1-v) )×〖10〗^(-9) v≈0.25 Air
V=4075 m/s ρ= 2182 kg/m^3
E_(c(t))=30.2 kN/〖mm〗^2
Water
V= 4275 m/s ρ= 2294 kg/m^3
E_(c(t))=34.9 kN/〖mm〗^2
ERUDITE test ;
E_c(t) = 4 n^2 L^2 ρ× 〖10〗^(-15)
L=500mm
Air ρ= 2182kg/m^3 n=3680Hz E_c(t) =29.5 kN/〖mm〗^2
Water
ρ= 2294kg/m^3 n=3771Hz E_c(t) =32.6 kN/〖mm〗^2
Static Modulus PUNDIT ERUDITE Air Water Air Water
E_cm= E_(c(t))/1.05 28.8 33.2 28.1 31.0

Direct Static modulus (water cured cylinder)
E_cm=22 〖((f_ck+8)/10)〗^0.3 f_ck=30.69 N/〖mm〗^2
E_cm=33.0 kN/〖mm〗^2
Static Modulus, E_cm=30.8 kN/〖mm〗^2

Flexural Tensile Strength
Air
P=148 kN f_ct=44.4 N/〖mm〗^2
Water
P=180 kN
f_ct=54