Bond behavior of self-compacting mortar containing construction and demolition waste under elevated temperatures

Benyahia, Amar

doi:10.1007/s42107-020-00321-4

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…e results showed that partial replacement of cement with RP reduced dry weight and compressive strength, and increased water absorption of SCM [4]. Although the above-mentioned related scholars have carried out research and discussion on the bond repairability of mortar, the practical application still fails to meet the expectations of buildings.…”

Section: Related Workmentioning

confidence: 99%

Bonding and Repairing Properties of Fiber-Polymer Mortar for Concrete Repair

2022

Advances in Materials Science and Engineering

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This article mainly introduced the effect of polymers on the bonding and repairing properties of mortar, explained the reason why concrete is easily damaged in actual operation, and introduced the improvement method. Through the influencing factors of mortar cohesiveness, the corresponding improvement measures were put forward and the factors affecting the bonding strength were explained. Through the comparison of the influencing factors of mortar cohesiveness, the experimental analysis was carried out. The polymer was added to the common mortar and compared in terms of flexural and compressive strength, water absorption, shrinkage rate, and frost resistance. After analyzing the experimental data, the principle of adding polymer performance enhancement was explained. The experimental results showed that the compressive and flexural strength of the mortar added with the polymer was effectively improved, the toughness was also enhanced, and the shrinkage rate was reduced by 49.7%. In the antifreeze test, the quality of ordinary mortar decreased by 1.35%, the quality of mortar added with polymer decreased by 0.33%, and the strength of the polymer was also strengthened. The water absorption decreased by 10%, and the tensile strength increased exponentially at the same time. At 7 d, it was 3.8 times that of ordinary mortar, at 28 d, it was 5.2 times, and the tensile strength was greatly improved. In construction regulations, polymer mortar has more practical application value and can meet various needs of engineering.

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Section: Related Workmentioning

confidence: 99%

Bonding and Repairing Properties of Fiber-Polymer Mortar for Concrete Repair

2022

Advances in Materials Science and Engineering

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“…Within the past two decades, there is a shift towards the use of self-compacting mortar for the rehabilitation and repair of reinforced concrete structures and the number of papers is published [8,9]. According to EFNARC specifications [10], self-compacting mortar is highly workable mortar that settles under its own weight without any vibration effort assures complete filling of formworks in thin and deep sections and even when access is hindered by narrow gaps between reinforcement bars, while maintaining stability.…”

Section: Introductionmentioning

confidence: 99%

Effects of Waste Glass Powder on Properties of Self-Compacting Repair Mortars

Benyahia

Boubekeur²

2022

JERA

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This paper studies the effects of fine waste glass powder content (WGP) on fresh and hardened properties of self-compacting repair mortar mixes (SCRMs). For this purpose, mortar mixes were prepared to replace cement with waste glass powder ranging from 0 to 30% at 10% interval and tested. Fresh properties were assessed using mini-slump flow and mini V-funnel. Hardened properties assessed for all mixes were water absorption (at 28-days of age), compressive and flexural strengths (at 7, 28 and 56-days of age). In addition, the adhesion between the repair mortar mixes and substrate was conducted using a 3-point flexural test on a composite prism (half mortar/half substrate) at 28 and 56-days of age. The results showed that glass powder had a negative effect on the workability of mortars. However, in the hardened state, it had a good influence on the strength development after 28 days, durability and adhesion of mortars with the substrate for a waste glass powder content not exceeding 20%.

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