Accelerator, retarder, admixture replacement, mortar, sustainability


Civil and Environmental Engineering | Civil Engineering | Engineering | Environmental Engineering


The most important engineering material nowadays, used in construction is concrete. Concrete consists mainly of sand, cement and aggregates. However, weather conditions play a crucial role in affecting concrete characteristics and its serviceability. Weather conditions could be the reason to delay or accelerate the setting time of the concrete. As a result, and in order to deal with weather conditions and its effect on the setting time of concrete, accelerators and retarders must be added to the concrete mix. This research paper focuses on the impact of the use of salt and sugar on the setting time of concrete. Accelerators, like salt, speed up the setting time, while retarders, like sugar, delay it. This paper specifically examines the effects of sugar and salt as separate materials on mortar mixes, with sugar and salt being cost-effective compared to traditional commercial admixtures in delaying setting time It also introduces a novel idea where the combined effects of salt and sugar on mortar is investigated. Different mortar mixes were prepared containing sugar or salt separate or combined. Tests included density, ultrasonic pulse velocity, compressive strength, and flexural strength. The dosages of sugar and salt are 0.15% and 0.3% by weight of cement. Tests are conducted at 7, 28, 56 and 90 days of curing where the water to cement ratio is set constant in all mixes at 0.5.

Author ORCID Identifier

Lelian W. ElKhatib: www.orcid.org/0000-0003-4752-834X

Jamal Khatib: www.orcid.org/0000-0002-4393-6728

Abbas Hassan: 0009-0005-9484-7361

Mohammad Kassem:0009-0005-7293-5512

Adel Elkordi: www.orcid.org/0000-0002-1487-8469





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