Useful and Practical Hints on the Process of Producing High-Strength Concrete

Ali, Faris; Abu-Tair, Abid; O’Connor, David; Benmarce, Abdelaziz; Nadjai, Ali

doi:10.1061/(asce)1084-0680(2001)6:4(150)

Cited by 7 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Young modulus of high-strength concrete was determined experimentally E C =41.6 N/mm 2 (see Ref. [29]). The columns were tested under 4 loading levels (a L =0, 0.2, 0.4, and 0.6) and two heating rates, high and low (see Fig.…”

Section: Tests On Restrained Columnsmentioning

confidence: 99%

Outcomes of a major research on fire resistance of concrete columns

Ali

Nadjai

Silcock

et al. 2004

Fire Safety Journal

Self Cite

124

View full text Add to dashboard Cite

Section: Tests On Restrained Columnsmentioning

confidence: 99%

Outcomes of a major research on fire resistance of concrete columns

Ali

Nadjai

Silcock

et al. 2004

Fire Safety Journal

Self Cite

124

View full text Add to dashboard Cite

“…Concrete with a cylinder compressive strength of 140 MPa (20,000 psi) is used in high-rise structures in the United States and Europe [2]. In certain laboratories, exotic concretes of 315 MPa (45,000 psi) have also been produced [3]. Since concrete has to be reinforced for structural use, the level of ductility of the reinforcement becomes the limiting factor, since higher strength concrete tends to exhibit lower ductility.…”

Section: Introductionmentioning

confidence: 99%

Experimental Time-Dependent Deflection of High Strength Concrete Panels

Numan

Ahmed²,

Rashied³

2017

AJCEA

View full text Add to dashboard Cite

This work presents an experimental study on both short-term and long-term deflections for a period more than seven months of reinforced high and normal strength reinforced concrete two-way flat plate panels. Four reinforced concrete panels with dimensions of (960×960×50) mm were investigated with simply supported edges. Concrete cube strength is about 75 MPa for HSC panels, and 30 MPa for the control panel. Sustain load kept along the entire test period and at the end, the loads is removed and the recoverable deflection was measured. It's been concluded that the rate of increase in HSC panels' long time deflection is less than that of NSC panels, also the longterm deflection is highly reduced by increasing the compressive strength of concrete and the long term deflection reduced about 20% when compressive strength increased from 25 to 65 MPa.

show abstract

“…Also, using HSC can allow contractors to strip formwork earlier, reducing project duration. Although HSC has many benefits, some concrete producers are concerned that testing laboratories are not capable of properly testing the compressive strength of HSC, because no special testing standard is available for this material, and HSC is more sensitive to testing errors (1,2). These testing errors occur because the cylinder ends deviate from perpendicularity and planeness requirements and because their conditions do not permit an evenly distributed load application.…”

mentioning

confidence: 99%

Capping Systems for High-Strength Concrete

Torres¹,

Eggers²

2006

Transportation Research Record

View full text Add to dashboard Cite

This study focused on the effects of capping systems on the compressive strength of high-strength concrete (HSC). The three systems investigated were ground ends, bonded caps, and unbonded pads. Five compressive strength groups were examined with strength levels ranging from 6,000 psi to 14,000 psi. The capping compounds investigated were commercially available and advertised for testing HSC. The unbonded pads were neoprene pads with a Shore A Durometer hardness of 70. A grinding machine was used to obtain the required planeness and perpendicularity on the ground end cylinders. No significant difference was found between the capping systems at the 6,000-psi, 10,000-psi, and 14,000-psi levels. Significant differences were detected at the 8,000-psi and 12,000-psi levels. In the 8,000-psi group, ground ends produced significantly lower compressive strengths than three of the capping compounds. For the 12,000-psi group, ground ends produced significantly lower strengths than one of the capping compounds and the unbonded pads. In all strength levels but the 6,000-psi level, the ground ends method produced lower average compressive strengths than the other methods studied. These results imply the viability of alternative methods of end treatments such as unbonded pads and capping compounds for use with HSC.

show abstract

Useful and Practical Hints on the Process of Producing High-Strength Concrete

Cited by 7 publications

References 3 publications

Outcomes of a major research on fire resistance of concrete columns

Outcomes of a major research on fire resistance of concrete columns

Experimental Time-Dependent Deflection of High Strength Concrete Panels

Capping Systems for High-Strength Concrete

Contact Info

Product

Resources

About