A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Predicted and measured hydraulic conductivity of sand-sized crushed limestone
https://orcid.org/0000-0002-2363-7632
https://orcid.org/0000-0002-3693-9410
Abstract The hydraulic conductivity of 54 sand-sized crushed limestone materials was measured by conducting constant head tests in a rigid-wall permeameter and was estimated using six predictive equations requiring easily obtainable parameters. The gradations tested had effective grain size, D10, from 0.079 to 2.15 mm; uniformity coefficient, Cu, from 1.19 to 15.79; and void ratio, e, from 0.42 to 0.76. The measured hydraulic conductivity had a range of about three orders of magnitude (3.4*$ 10^{−3} $ to 3.3 cm/s). Four of the predictive equations, based on the square of the effective grain size, D102, yielded closely grouped results differing by not more than a factor of 2. Long existing equations by Terzaghi (1925) and by Hazen (1892), adjusted for void ratio according to Taylor (1948), were found to have a high predictive efficiency with a ratio of predicted to measured values between 1/2 and 2 for 70% of the materials tested. The Kenney et al. (1984) equation, based on D52, was also efficient but underestimated measured values for 63% of all cases. The Kozeny–Carman equation (Taylor 1948; Chapuis 2012), based on specific surface, overestimated measurements for 90% of the tested materials by a factor of up to 3.
Predicted and measured hydraulic conductivity of sand-sized crushed limestone
https://orcid.org/0000-0002-2363-7632
https://orcid.org/0000-0002-3693-9410
Abstract The hydraulic conductivity of 54 sand-sized crushed limestone materials was measured by conducting constant head tests in a rigid-wall permeameter and was estimated using six predictive equations requiring easily obtainable parameters. The gradations tested had effective grain size, D10, from 0.079 to 2.15 mm; uniformity coefficient, Cu, from 1.19 to 15.79; and void ratio, e, from 0.42 to 0.76. The measured hydraulic conductivity had a range of about three orders of magnitude (3.4*$ 10^{−3} $ to 3.3 cm/s). Four of the predictive equations, based on the square of the effective grain size, D102, yielded closely grouped results differing by not more than a factor of 2. Long existing equations by Terzaghi (1925) and by Hazen (1892), adjusted for void ratio according to Taylor (1948), were found to have a high predictive efficiency with a ratio of predicted to measured values between 1/2 and 2 for 70% of the materials tested. The Kenney et al. (1984) equation, based on D52, was also efficient but underestimated measured values for 63% of all cases. The Kozeny–Carman equation (Taylor 1948; Chapuis 2012), based on specific surface, overestimated measurements for 90% of the tested materials by a factor of up to 3.
Predicted and measured hydraulic conductivity of sand-sized crushed limestone
https://orcid.org/0000-0002-2363-7632
https://orcid.org/0000-0002-3693-9410
Abstract The hydraulic conductivity of 54 sand-sized crushed limestone materials was measured by conducting constant head tests in a rigid-wall permeameter and was estimated using six predictive equations requiring easily obtainable parameters. The gradations tested had effective grain size, D10, from 0.079 to 2.15 mm; uniformity coefficient, Cu, from 1.19 to 15.79; and void ratio, e, from 0.42 to 0.76. The measured hydraulic conductivity had a range of about three orders of magnitude (3.4*$ 10^{−3} $ to 3.3 cm/s). Four of the predictive equations, based on the square of the effective grain size, D102, yielded closely grouped results differing by not more than a factor of 2. Long existing equations by Terzaghi (1925) and by Hazen (1892), adjusted for void ratio according to Taylor (1948), were found to have a high predictive efficiency with a ratio of predicted to measured values between 1/2 and 2 for 70% of the materials tested. The Kenney et al. (1984) equation, based on D52, was also efficient but underestimated measured values for 63% of all cases. The Kozeny–Carman equation (Taylor 1948; Chapuis 2012), based on specific surface, overestimated measurements for 90% of the tested materials by a factor of up to 3.
Predicted and measured hydraulic conductivity of sand-sized crushed limestone
Toumpanou, Ioanna C. (author) / Pantazopoulos, Ioannis A. (author) / Markou, Ioannis N. (author) / Atmatzidis, Dimitrios K. (author)
2020
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
The Fracture Characteristics of Crushed Limestone Sand Concrete
| Online Contents | 1997
The Fracture Characteristics of Crushed Limestone Sand Concrete
| British Library Online Contents | 1997
The fracture characteristics of crushed limestone sand concrete
| Tema Archive | 1997
Strength and durability of concrete incorporating crushed limestone sand
| Online Contents | 2009
Long-Term Deflections of Crushed Limestone Sand Concrete Beams
| British Library Conference Proceedings | 2013