Mineralogical effect on the pozzolanic reactivity of a Mexican lacustrine soil
Clay minerals have been used as natural pozzolans with the aim of reducing CO 2 emissions, and densifying the matrix with hydration products in pastes and mortars. This study assesses the pozzolanic reactivity of a natural lacustrine material in its natural and thermally-treated states. The influenc...
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| Veröffentlicht in: | Construction & building materials 2010-12, Vol.24 (12), p.2650-2657 |
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| creator | Martinez-Reyes, Jacobo Alavez-Ramírez, Rafael Montes-García, Pedro Jiménez-Quero, Victor |
| description | Clay minerals have been used as natural pozzolans with the aim of reducing CO
2 emissions, and densifying the matrix with hydration products in pastes and mortars. This study assesses the pozzolanic reactivity of a natural lacustrine material in its natural and thermally-treated states. The influence of mineralogical characteristics on the physicochemical and mechanical properties of pastes and mortars with a level of replacement of 20% was evaluated. Studies of crystallography, chemical analysis, morphology, mineralogical phases, particle size distribution and enthalpy were conducted. The results indicate that thermally-activated systems have better structure and develop a more homogeneous matrix. It was observed that poorly-crystalline mineralogical impurities do not influence the pozzolanic reactivity; moreover, the PAI (pozzolanic reactivity index) was in the order 86.59% in mortar systems including thermally-treated material, which is a much higher value when compared to only 41.92% obtained when the material was in its natural state. |
| doi_str_mv | 10.1016/j.conbuildmat.2010.04.059 |
| format | Article |
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2 emissions, and densifying the matrix with hydration products in pastes and mortars. This study assesses the pozzolanic reactivity of a natural lacustrine material in its natural and thermally-treated states. The influence of mineralogical characteristics on the physicochemical and mechanical properties of pastes and mortars with a level of replacement of 20% was evaluated. Studies of crystallography, chemical analysis, morphology, mineralogical phases, particle size distribution and enthalpy were conducted. The results indicate that thermally-activated systems have better structure and develop a more homogeneous matrix. It was observed that poorly-crystalline mineralogical impurities do not influence the pozzolanic reactivity; moreover, the PAI (pozzolanic reactivity index) was in the order 86.59% in mortar systems including thermally-treated material, which is a much higher value when compared to only 41.92% obtained when the material was in its natural state.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.conbuildmat.2010.04.059</doi><tpages>8</tpages></addata></record> |
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| issn | 0950-0618 1879-0526 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Building materials Compressive strength Construction materials Differential-thermal analysis Hydration Microstructure Morphology Mortars Natural pozzolans Pastes Polyamide-imides Pozzolans Thermo-gravimetrical analysis |
| title | Mineralogical effect on the pozzolanic reactivity of a Mexican lacustrine soil |
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