ARCOM

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Bellifa, S and Boumechra, N (2019) Effects of calcium leaching on the physical and mechanical properties of aerial lime-cement mortars. Journal of Engineering, Design and Technology , 17(03), 649–66.

Type: Journal Article
Keywords: Leaching; Aerial lime-cement; Ammonium nitrate; Degradation; Leached depth; Calcium hydroxide;
ISBN/ISSN: 1726-0531
URL: https://doi.org/10.1108/JEDT-11-2018-0199
Abstract:
This paper aims to assess the effects of chemically accelerated leaching on the physical and mechanical properties of aerial lime–cement mortars (LCMs). Design/methodology/approach Two aerial LCMs, differencing mainly in their calcium hydroxide content, were degraded by the use of an ammonium nitrate solution as a leaching agent. The leaching effects were studied by evaluating the rate of change in physical (sorptivity and mass loss) and mechanical (flexural and compressive strength) characteristics of aerial LCMs. To quantify the evolution and kinetics of degradation, the leached depth was then characterized at different levels of degradation by means of a phenolphthalein solution. Findings The experimental results showed that the dissolution of binder decreases the mass, alkalinity and strength of aerial LCMs but increases their sorptivity. A linear relationship was derived by plotting the values of leached depth against the square root of immersion time in an aggressive solution. It was found that the leached depth followed diffusion-controlled kinetics. Originality/value It was found that the global loss of compressive strength of aerial LCMs because of complete dissolution of calcium hydroxide can reach up to 80 per cent.

Dang, C N and Le-Hoai, L (2019) Relating knowledge creation factors to construction organizations’ effectiveness. Journal of Engineering, Design and Technology, 17(03), 515–36.

Dithebe, K, Aigbavboa, C O, Thwala, W D and Oke, A E (2019) Analysis on the perceived occurrence of challenges delaying the delivery of water infrastructure assets in South Africa. Journal of Engineering, Design and Technology , 17(03), 554–71.

Kereri, J O and Adamtey, S (2019) RFID use in residential/commercial construction industry. Journal of Engineering, Design and Technology , 17(03), 591–612.

Mayouf, M, Gerges, M and Cox, S (2019) 5D BIM: an investigation into the integration of quantity surveyors within the BIM process. Journal of Engineering, Design and Technology , 17(03), 537–53.

Mekid, S and Bashmal, S (2019) Engineering manipulation at nanoscale: further functional specifications. Journal of Engineering, Design and Technology, 17(03), 572–90.

Mostafaeipour, A, Goudarzi, H, Sedaghat, A, Jahangiri, M, Hadian, H, Rezaei, M, Golmohammadi, A and Karimi, P (2019) Energy efficiency for cooling buildings in hot and dry regions using sol-air temperature and ground temperature effects. Journal of Engineering, Design and Technology, 17(03), 613–28.

Thakur, N, Awasthi, Y, Hooda, M and Siddiqui, A S (2019) Adaptive whale optimization for intelligent multi-constraints power quality improvement under deregulated environment. Journal of Engineering, Design and Technology, 17(03), 490–514.