TY  - JOUR
T1  - Effect of Concrete Retempering Methods on Fresh and Hardened Concrete
Properties for Normal and High Strength Concrete
AU - Arab, M.A. AU - Abdel-Aziz, M.A. AU - Hussien, R.M. 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 23
SP  - 8903
EP  - 8911
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.8903.8911
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.8903.8911
KW  - Retempering
KW  -normal strength
KW  -high strength
KW  -workability
KW  -mechanical properties
KW  -HSC
AB  - Concrete retempering is the procedure that is used to restore the lost workability in ready mixed
concrete. Adding an extra amount of water for retempering concrete is the common practice but adding an extra
amount of water without exact calculation in mixture proportions makes compressive strength affects harmfully.
As a result of delivery delaying or concreting in conditions of hot weather, abnormal slumps loss is expected,
therefore, it is usual to modify the normal concrete placing and finishing procedures consequently. This
research aims to evaluate different concrete retempering methods and their effect on concrete characteristics
which gives the user the ability to choose the suitable method according to the expected concrete properties.
In this research the experimental program was carried out to investigate the influence and the effect of
retempering time (with 15 min time interval ranging between 0 up to 120 min) without any additions, retempering
with adding water, superplasticizer and extra amount of cement paste on slump test and the mechanical
properties of Normal Strength Concrete (NSC) and High Strength Concrete (HSC).
ER  -