Abstract
Portland cement is unquestionably the primary cementitious material used in
construction. Its massive production and usage contributes 2.83 billion tonnes of CO2 emissions (roughly 2.3% of the total emissions) worldwide in 2008 alone and 5-7% to the global anthropogenic CO2 emissions in general. Considering this environmental situation with its attendant large energy consumption, this study seeks to evolve a low carbon composite construction material in form of cement-lime mortar with cement serving as a partial replacement for lime. It aims at evolving acceptable combination ratio(s) of cement and lime for emergence of possible sustainable composite material in new construction
works. The research is focused on mortars with same binder/aggregate mix ratios using five
different compositions of cement/lime binder (i.e. 1:1, 1:2, 1:3, 3:1 and 2:1). The
methodology involves comparative evaluations of each composition’s mechanical
characteristic connections enhanced by their microstructural features (MIP method) at one
and six months of curing. In maximising their sustainable performance synergy, the results of
this study suggest appropriate volumetric combination ratios of the composite materials,
keeping in mind the final desirable effect of strength development or quickening hardening
process. This in effect, would further facilitate lime usage revival, minimise carbon emissions
and ultimately, protect natural environment from construction standpoint.
construction. Its massive production and usage contributes 2.83 billion tonnes of CO2 emissions (roughly 2.3% of the total emissions) worldwide in 2008 alone and 5-7% to the global anthropogenic CO2 emissions in general. Considering this environmental situation with its attendant large energy consumption, this study seeks to evolve a low carbon composite construction material in form of cement-lime mortar with cement serving as a partial replacement for lime. It aims at evolving acceptable combination ratio(s) of cement and lime for emergence of possible sustainable composite material in new construction
works. The research is focused on mortars with same binder/aggregate mix ratios using five
different compositions of cement/lime binder (i.e. 1:1, 1:2, 1:3, 3:1 and 2:1). The
methodology involves comparative evaluations of each composition’s mechanical
characteristic connections enhanced by their microstructural features (MIP method) at one
and six months of curing. In maximising their sustainable performance synergy, the results of
this study suggest appropriate volumetric combination ratios of the composite materials,
keeping in mind the final desirable effect of strength development or quickening hardening
process. This in effect, would further facilitate lime usage revival, minimise carbon emissions
and ultimately, protect natural environment from construction standpoint.
| Original language | English |
|---|---|
| Title of host publication | The 9th International Concrete Conference 2016. Environment, Efficiency and Economic Challenges for Concrete |
| Editors | M Jones, M Newlands, J Halliday, L Csetenyi, L Zheng, M McCarthy, T Dyer |
| Pages | 327-340 |
| Number of pages | 14 |
| Publication status | Published - Jul 2016 |
Keywords
- building material
- cement-lime composites
- low carbon
- sustainable