Concrete quality assessment before building structures submitting to environmental exposure conditions
| Autor: | Abel Castañeda, Juan José Howland Albear, Francisco Corvo, Rigoberto Marrero |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Cement
Materials science Capillary action Scanning electron microscope 0211 other engineering and technologies 02 engineering and technology Environmental exposure 021001 nanoscience & nanotechnology Durability capillary Corrosion Permeability (earth sciences) porosity Compressive strength quality 021105 building & construction durability Composite material 0210 nano-technology Concrete |
| Zdroj: | Revista de la construcción v.16 n.3 2017 SciELO Chile CONICYT Chile instacron:CONICYT |
| DOI: | 10.7764/rdlc.16.3.374 |
| Popis: | DOI: 10.7764/RDLC.16.3.374 Abstract A study on concrete quality assessment before building structures submitting to environmental exposure conditions was carried out. It was necessary to determine the ultrasonic velocity pulse, compressive strength and percentage of effective capillary porosity values in concretes probes of water/cement ratio 0.4, 0.5 and 0.6.The results allowed to demonstrate how from relationship between compressive strength and percentage of effective capillary porosity, as well as, from relationship between capillary coefficient absorption and percentage of effective capillary porosity, durability requirements were obtained. Durability requirements were: Critical value of percentage of effective capillary porosity from which the concrete permeability increased. Critical value of percentage of effective capillary porosity from which, compressive strength decreased. Ultrasonic pulse velocity and compressive strength tests by itself were not enough to concrete quality assessment. Results using the visual observation were confirmed, in the reinforced concrete probes exposed to corrosivity categories of the atmospheres very high (C5) and extreme (CX) in a tropical coastal climates during three years, as well as by scanning electron microscopy tests in small samples of hardened cement paste for the three water/cement ratios. |
| Databáze: | OpenAIRE |
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