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The effect of mixing water temperature on concrete properties in hot weather conditions
Environmental factors and hot weather conditions can drastically impact the properties, strength and durability of concrete structures. Whereby, higher slump loss rate, faster hydration with accelerated setting, reduced long term compressive strength and plastic shrinkage are more common. Literature...
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AUC Knowledge Fountain
2017
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| _version_ | 1867613408266813440 |
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| access_status_str | Open Access |
| author | Assal, Mennatallah Amr |
| author_browse | Assal, Mennatallah Amr |
| author_facet | Assal, Mennatallah Amr |
| author_sort | Assal, Mennatallah Amr |
| collection | Thesis |
| dc_rights_str_mv | The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. |
| description | Environmental factors and hot weather conditions can drastically impact the properties, strength and durability of concrete structures. Whereby, higher slump loss rate, faster hydration with accelerated setting, reduced long term compressive strength and plastic shrinkage are more common. Literature review on the impact of hot weather on concrete is not sufficiently elaborated and at the same time majority of studies focused on curing temperature on overall concrete quality, however sufficient research on the effect of casting temperature on the concrete itself and its materials is lacking. This study is carried out to investigate the direct impact of mixing water temperature and concrete temperature on the concrete properties serving in hot weather conditions, with special emphasis to the Egyptian hot climate throughout the year. Thus, the scope of this work is to study mixing water temperature’s impact on concrete properties being a key ingredient to the concrete mix, with direct impact on workability, strength and durability. The feasibility of cooling water as a remedial action in hot climate is covered for various project sizes. To achieve the work objective, four categories of concrete mixtures with various cement contents and admixtures were studied while changing the mixing water temperature at 5, 25 and 45˚C to yield a total 12 different test sets. All other concrete ingredients were heated to 45˚C ahead of mixing to simulate hot weather conditions. Two sets of results were analyzed starting with fresh concrete tests of slump, unit weight and concrete temperature; in addition to hardened concrete tests of compressive and flexural strengths. Results showed an average 15% increase in the 28 days concrete compressive strength and enhanced workability in 5 ˚C temperature water Vs. 45 ˚C suggesting the strong impact of water temperature on concrete properties and need to add cool mixing water to concrete cast in hot weather conditions. Recommendations are provided towards the incorporation of cold water in concrete with a market feasibility conducted to study the technical and economic aspects resulting in up to 9% reduction in concrete cost with cold mixing water incorporated. Keywords : (Water, Concrete, Temperature, Hot Weather, Cooling, Feasibility) |
| format | Thesis |
| id | oai:fount.aucegypt.edu:etds-1192 |
| institution | American University in Cairo (Egypt) |
| last_indexed | 2026-06-10T12:35:39.635Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from AUC Knowledge Fountain — bepress |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | AUC Knowledge Fountain |
| publisherStr | AUC Knowledge Fountain |
| record_format | dspace |
| source_str | AUC Knowledge Fountain — bepress |
| spelling | oai:fount.aucegypt.edu:etds-1192 The effect of mixing water temperature on concrete properties in hot weather conditions Assal, Mennatallah Amr Environmental factors and hot weather conditions can drastically impact the properties, strength and durability of concrete structures. Whereby, higher slump loss rate, faster hydration with accelerated setting, reduced long term compressive strength and plastic shrinkage are more common. Literature review on the impact of hot weather on concrete is not sufficiently elaborated and at the same time majority of studies focused on curing temperature on overall concrete quality, however sufficient research on the effect of casting temperature on the concrete itself and its materials is lacking. This study is carried out to investigate the direct impact of mixing water temperature and concrete temperature on the concrete properties serving in hot weather conditions, with special emphasis to the Egyptian hot climate throughout the year. Thus, the scope of this work is to study mixing water temperature’s impact on concrete properties being a key ingredient to the concrete mix, with direct impact on workability, strength and durability. The feasibility of cooling water as a remedial action in hot climate is covered for various project sizes. To achieve the work objective, four categories of concrete mixtures with various cement contents and admixtures were studied while changing the mixing water temperature at 5, 25 and 45˚C to yield a total 12 different test sets. All other concrete ingredients were heated to 45˚C ahead of mixing to simulate hot weather conditions. Two sets of results were analyzed starting with fresh concrete tests of slump, unit weight and concrete temperature; in addition to hardened concrete tests of compressive and flexural strengths. Results showed an average 15% increase in the 28 days concrete compressive strength and enhanced workability in 5 ˚C temperature water Vs. 45 ˚C suggesting the strong impact of water temperature on concrete properties and need to add cool mixing water to concrete cast in hot weather conditions. Recommendations are provided towards the incorporation of cold water in concrete with a market feasibility conducted to study the technical and economic aspects resulting in up to 9% reduction in concrete cost with cold mixing water incorporated. Keywords : (Water, Concrete, Temperature, Hot Weather, Cooling, Feasibility) 2017-02-01T08:00:00Z thesis application/pdf https://fount.aucegypt.edu/etds/193 https://fount.aucegypt.edu/context/etds/article/1192/viewcontent/The_20Effect_20of_20Mixing_20Water_20Temperature_20on_20Concrete_20Properties_20in_20Hot_20Weather_20Conditions_20__20Mennatallah_20Assal.pdf The author retains all rights with regard to copyright. The author certifies that written permission from the owner(s) of third-party copyrighted matter included in the thesis, dissertation, paper, or record of study has been obtained. The author further certifies that IRB approval has been obtained for this thesis, or that IRB approval is not necessary for this thesis. Insofar as this thesis, dissertation, paper, or record of study is an educational record as defined in the Family Educational Rights and Privacy Act (FERPA) (20 USC 1232g), the author has granted consent to disclosure of it to anyone who requests a copy. Theses and Dissertations AUC Knowledge Fountain Water Concrete |
| spellingShingle | Water Concrete Assal, Mennatallah Amr The effect of mixing water temperature on concrete properties in hot weather conditions |
| title | The effect of mixing water temperature on concrete properties in hot weather conditions |
| title_full | The effect of mixing water temperature on concrete properties in hot weather conditions |
| title_fullStr | The effect of mixing water temperature on concrete properties in hot weather conditions |
| title_full_unstemmed | The effect of mixing water temperature on concrete properties in hot weather conditions |
| title_short | The effect of mixing water temperature on concrete properties in hot weather conditions |
| title_sort | effect of mixing water temperature on concrete properties in hot weather conditions |
| topic | Water Concrete |
| url | https://fount.aucegypt.edu/etds/193 https://fount.aucegypt.edu/context/etds/article/1192/viewcontent/The_20Effect_20of_20Mixing_20Water_20Temperature_20on_20Concrete_20Properties_20in_20Hot_20Weather_20Conditions_20__20Mennatallah_20Assal.pdf |
| work_keys_str_mv | AT assalmennatallahamr theeffectofmixingwatertemperatureonconcretepropertiesinhotweatherconditions AT assalmennatallahamr effectofmixingwatertemperatureonconcretepropertiesinhotweatherconditions |