Effect of supporting conditions on the long-term load capacity of high strength concrete panels

2012 ◽  
pp. 287-291 ◽  
Author(s):  
Y Huang ◽  
E Hamed
Keyword(s):  
High Strength Concrete ◽  
Load Capacity ◽  
High Strength ◽  
Strength Concrete ◽  
Concrete Panels

scholarly journals Low velocity impact behaviour of ultra high strength concrete panels

Sadhana ◽  
2014 ◽  
Vol 39 (6) ◽  
pp. 1497-1507 ◽  
Author(s):  
SMITHA GOPINATH ◽  
R AYASHWARYA ◽  
V RAMESH KUMAR ◽  
PRABHAT RANJAN PREM ◽  
A RAMA CHANDRA MURTHY ◽  
...  
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Behaviour ◽  
Strength Concrete ◽  
Concrete Panels

Characteristics of Treated Palm Oil Fuel Ash and its Effects on Properties of High Strength Concrete

2012 ◽  
Vol 626 ◽  
pp. 152-156 ◽  
Author(s):  
A.M. Zeyad ◽  
M.A. Megat Johari ◽  
Norazura Muhamad Bunnori ◽  
K.S. Ariffin ◽  
Nurdeen M. Altwair
Keyword(s):  
Palm Oil ◽  
High Strength Concrete ◽  
High Strength ◽  
Ash Content ◽  
Unburned Carbon ◽  
Palm Oil Fuel Ash ◽  
Strength Concrete ◽  
Fuel Ash ◽  
Oil Fuel

Palm oil fuel ash obtained from palm oil mill was treated via screening, grinding and heating to improve its pozzolanic reactivity. The characteristics of the palm oil fuel ash before and after treatment were monitored to assess the changes in the properties of the palm oil fuel ash. The resulting ultrafine palm oil fuel ash was then utilized to produce high strength concrete by replacing the ordinary Portland cement at 0, 20, 40 and 60% on mass-for-mass basis. The results show that the treatment process undertaken reduces the particle size, diminishes the unburned carbon content, while at the same time increases the glassy phases. The utilization of the ultrafine palm oil fuel ash in high strength concrete was observed to improve workability especially at higher ultrafine palm oil fuel ash content. In addition, the long-term compressive strength of the high strength concrete was significantly increased with the ultrafine palm oil fuel ash inclusion. Further, the long-term rapid chloride permeability was significant reduced especially at higher ultrafine palm oil fuel ash content of 60%, which could be translated into superior durability performance.

scholarly journals Performance Assessment of the Post-Tensioned Anchorage Zone Using High-Strength Concrete Considering Confinement Effect

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1748
Author(s):  
Jun Suk Lee ◽  
Byeong Hun Woo ◽  
Jae-Suk Ryou ◽  
Jee-Sang Kim
Keyword(s):  
Tensile Strength ◽  
Performance Assessment ◽  
High Strength Concrete ◽  
Load Capacity ◽  
High Strength ◽  
Confinement Effect ◽  
The Other ◽  
Strength Concrete ◽  
Nominal Tensile Strength ◽  
Post Tensioned

Post-tensioned anchorage zones need enough strength to resist large forces from jacking forces from prestress and need spiral reinforcement to give confinement effect. High-strength concrete (HSC) has high-strength and brings the advantage of reducing material using and simplifying reinforcing. We tested strain stabilization, load–displacement, and strain of lateral reinforcements. Specimens that used one and two lateral reinforcements without spiral reinforcement did not satisfy the strain stabilization. Load capacity also did not satisfy the condition of 1.1 times the nominal tensile strength of PS strands presented in ETAG 013. On the other hand, specimens that used three and four lateral reinforcements without spiral reinforcement satisfied the strain stabilization but did not satisfy 1.1 times the nominal tensile strength of PS strands. However, the secondary confinement effect could be confirmed from strain stabilization. In addition, the affection of HSC characteristics could be confirmed from a reinforcing level comparing other studies. The main confinement effect could be confirmed from the reinforcement strain results; there was a considerable difference between with and without spiral reinforcement at least 393 MPa. Comprehensively, main and secondary confinement effects are essential in post-tensioned anchorage zones. In addition, the performance of the anchorage zone could be increased by using HSC that the combination of high-strength and confinement effect.

scholarly journals Long Term Stability and Microstructure of Steam Cured High Strength Concrete with Ettringite Based Additives.

1995 ◽  
Vol 44 (502) ◽  
pp. 967-972
Author(s):  
Hiroshi MUGURUMA ◽  
Yoshihisa MATSUNAGA ◽  
Yoshiharu WATANABE ◽  
Etsuo SAKAI
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Term Stability ◽  
Long Term Stability
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