Results 241 to 250 of about 3,990,489 (310)

Assessing concrete strength variability in existing structures based on the results of NDTs

Construction and Building Materials, 2018
One of the main factors affecting the survey of concrete strength in existing structures is the inherent material variability, which can only be fully characterized when destructive tests are performed, especially in older structures. Therefore, having a
N. Pereira, X. Romão
semanticscholar   +1 more source

Dynamic strength of concrete

Hydrotechnical Construction, 1994
Recommendations for evaluating the dynamic strength of concrete structures at hydroelectric power stations are given. Both existing and planned structures are addressed. Equations are provided for determing the design compressive and tensile strength of concrete.
V. A. Logunova, V. V. Rudenko, A. K. Radionov, I. B. Sokolov   +3 more
openaire   +1 more source

Core Strengths of High-Strength Concrete

"SP-172: High-Performance Concrete - Proceedings: ACI International Conference, Malaysia 1997", 1999
The effects of varying L/D ratios and core size on the strength of cores from large elements of high strength concrete (HSC) made both in the laboratory and field were examined. 154 cores representing 5 laboratory mixtures having moist-cured cylinder compressive strengths from 114 to 142 MPa at 5-years age and 101 cores representing actual field ...
openaire   +1 more source

Determination of the reinforced concrete strength by apparent resistivity depending on the curing conditions

Journal of Applied Geophysics, 2018
In this study, change of the apparent resistivity values was investigated on reinforced and unreinforced concrete samples that were designed in different strength of the dry and water saturated conditions.
N. Sabbaǧ, O. Uyanik
semanticscholar   +1 more source

Strength of concrete

1979
The application of Griffith’s theory to explain failure in hardened cement paste is discussed in Chapter 4. Failure due to external loading is brought about by the spontaneous growth of the critical crack when the strain energy release rate equals the maximum rate of energy requirement. At this point the rate of energy release is known as the ‘critical
openaire   +1 more source

Strength Criteria for Concrete

1986
A new proposed third order polynomial strength criterion, based on tensorial function theory of continuum mechanics, has been used to determine the strength parameters for concrete. A straight-forward computer program to determine the parameters and plot the strength envelope has been developed.
C. L. D. Huang, Cui Lei
openaire   +1 more source

Initial strength of graded concrete beams on varying concrete strength

AIP Conference Proceedings, 2022
Ziana Nur Afdila, Moch. Febrian Andi P., M. Mirza Abdillah Pratama   +2 more
openaire   +1 more source

Development of the Strength of Concrete

1983
The rate of hydration, and consequently the time-related process of strength development of concrete, depends on the type of cement used. In Fig. 2.1,1 the coefficient \( {{\beta }_{t}} = {{f'}_{{ct}}}/{{f'}_{{c28}}} \) for concrete made of normal cement (Type I), of rapid Open image in new window Fig. 2.1,1 The relations given in Fig.
Hubert Rüsch, Dieter Jungwirth, Hubert K. Hilsdorf   +2 more
openaire   +1 more source

The early-age prediction of concrete strength using maturity models: a review

, 2021
K. Nandhini, J. Karthikeyan
semanticscholar   +1 more source

Experimental evaluation of concrete-to-UHPC bond strength with correlation to surface roughness for repair application

, 2020
Exposing bridge elements to severe environmental conditions causes a reduction in service life and durability which demands repair or total replacement. Different strategies for repair and retrofit can be chosen.
A. Valikhani, Azadeh Jaberi Jahromi, Islam M. Mantawy, A. Azizinamini   +3 more
semanticscholar   +1 more source