Study of underwater concrete using two-stage (preplaced aggregate) concrete in Libya

2010 ◽  
Vol 11 (3) ◽  
pp. 161-165 ◽  
Author(s):  
H. S. Abdelgader ◽  
M. F. Najjar ◽  
T. M. Azabi
Keyword(s):  
Two Stage ◽  
Aggregate Concrete ◽  
Underwater Concrete

Quality Improvement of Recycled Aggregate Concrete

2006 ◽  
Vol 302-303 ◽  
pp. 308-313 ◽  
Author(s):  
Vivian W.Y. Tam ◽  
X.F. Gao ◽  
C.M. Tam
Keyword(s):  
Compressive Strength ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Two Stage ◽  
New Approach ◽  
Aggregate Concrete ◽  
Strength Based ◽  
Mixing Method ◽  
Strength Variability

The developments of recycled aggregate concrete pressing hard in construction activities; however, the limitations on their applications had never being ended. The focus of this paper is: i) investigating the waste management strategy in construction; ii) proposing the two-stage mixing approach (TSMA) to improve the quality of RAC; and iii) experimenting the TSMA and assessing the benefits possibly gained. It proposes a new approach in mixing concrete, namely, the two-stage mixing method, to improve compressive strength of RAC and lower its strength variability. The replacement ratio from zero to thirty is under experiment on their compressive strength. Based upon the experimental results, improvements of 31 % in strength at 28 days with 30 % RA substitute was achieved. The effect can be attributably to the porous nature of the RA and the pre-mix process which can make some pores filled up resulting in a denser concrete and thus leading to higher strength when compared with the traditional mixing approach. Therefore, two-stage mixing approach can open up a wider application of recycled aggregate concrete.

Feasibility of producing two‐stage (preplaced aggregate) concrete by gravity process

2019 ◽  
Vol 21 (3) ◽  
pp. 1157-1163
Author(s):  
Kunal K. Das ◽  
Eddie S. S. Lam
Keyword(s):  
Two Stage ◽  
Aggregate Concrete

scholarly journals Utilization of two stage concreting method in the case of steel slag aggregate concrete

2018 ◽  
Vol 431 ◽  
pp. 082008
Author(s):  
Nguyen Khanh Son ◽  
Nguyen Trung Tin ◽  
Nguyen Ngoc Tri Huynh
Keyword(s):  
Steel Slag ◽  
Two Stage ◽  
Aggregate Concrete

Effect of admixtures on fresh grout and two-stage (pre-placed aggregate) concrete

2007 ◽  
Vol 8 (1) ◽  
pp. 17-23 ◽  
Author(s):  
A. Nowek ◽  
P. Kaszubski ◽  
H. S. Abdelgader ◽  
J. Górski
Keyword(s):  
Two Stage ◽  
Aggregate Concrete

Effect of mineral additives and two-stage mixing on the performance of recycled aggregate concrete

2020 ◽  
Vol 22 (5) ◽  
pp. 1587-1601 ◽  
Author(s):  
Rayhan Md. Faysal ◽  
Mohammed Maslehuddin ◽  
Mohammed Shameem ◽  
Shamsad Ahmad ◽  
Saheed Kolawole Adekunle
Keyword(s):  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Two Stage ◽  
Aggregate Concrete ◽  
Mineral Additives
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