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5 results for “precast element”
Case study of self-compacting, fiber reinforced, lightweight concrete, intended for production of precast elements
<p>This a dataset set to paper entitled: "Case study of self-compacting, fiber reinforced, lightweight concrete, intended for production of precast elements".</p> <p>Dataset is one excel file divided in various sheets containing:</p> <ol> <li>Properties of used aggregates</li> <li>Initial properties of concrete</li> <li>Composition of concrete</li> <li>Concrete with fibres</li> <li>Final concrete</li> </ol>
2 PREHEALING: Design of concrete precast elements incorporating sustainable strategies for self-healing to increase their service life. Concrete analysis
<div>This project addresses the analysis of the performance of concrete with internal curing aggregates (ICA), low-clinker cementitious materials, and steel fibres for use in real applications in the precast industry. A total of eight mixes were designed: 100C, 60C25BA15M (where BA denotes forestry biomass and M denotes metakaolin), 60C25LF15M (with LF as limestone filler and M as metakaolin), 100C-30CBA (where CBA denotes porous aggregate from coal ash), 60C25BA15M-30CBA, 60C25LF15M-30CBA, 60C25BA15M-30CBA-F (where F denotes fibres), and 60C25LF15M-30CBA-F. Two different curing conditions were analysed (standard water curing and humidity/drying cycles), assessing the recovery of mechanical properties and four curing conditions for impermeability recovery: i) carbonated water (CW), ii) immersion/drying cycles in carbonated water (CW wet-dry), iii) tap water (TW), and iv) immersion/drying cycles in tap water (TW wet-dry).</div> <div> </div> <div>This section includes the results of all tests conducted during the experimental campaign, divided into two files:</div> <div> </div> <div> <ul> <li>01_Permeability Test.zip: <br>The attached files contain the results of the permeability tests conducted on cracks opened through the indirect tensile test on cylindrical discs. Permeability tests were initially performed after the crack was opened and then following a self-healing process under four curing conditions: i) carbonated water (CW), ii) immersion/drying cycles in carbonated water (CW wet-dry), iii) tap water (TW), and iv) immersion/drying cycles in tap water (TW wet-dry), at two exposure times: 28 and 90 days.</li> </ul> </div> <div> <ul> <li>02_Mechanical Recovery.zip:<br>The attached files contain the results of the three-point bending test, including crack opening measurements and the force applied at each interval. The cracks were reopened after a curing period in continuous tap water and in immersion/drying cycles. After a period of 28 and 90 days, the cracks were reopened to calculate the mechanical recovery during the self-healing period. The attached files contain all test results conducted during both phases.</li> </ul> </div>
1 PREHEALING: Design of concrete precast elements incorporating sustainable strategies for self-healing to increase their service life. Material characterization
<p>This project deals with the analysis of the performance of concrete with internal curing aggregates (IC), low clinker cementitious materials and steel fibres, to be used in real applications in the field of precast industry.</p> <p>The low clinker cementitious material will be composed of clinker (C), metakaolin (MK) and limestone filler (LF) as powder material. In order to promote the sustainability of these products, a sustainable powder (SP) obtained from wood ash will be included. In addition, aggregates from coal bottom ash (CBA) will be used as internal curing water reservoirs.</p> <p>This section includes the characterization of these materials providing their main properties as particle size distribution, density or absorption, among others</p>
3 PREHEALING: Design of concrete precast elements incorporating sustainable strategies for self-healing to increase their service life: Full-Scale Prototypes
<p>This project deals with the analysis of the performance of concrete with internal curing aggregates (IC), low clinker cementitious materials and steel fibres, to be used in real applications in the field of precast industry.</p> <div>This section includes the design and results of the four wall prototypes: two constructed with the 100C mix and two with the 60C25BA15MK-30CBA mix. The model shows the instrumentation used. The foundation of all walls was constructed with conventional concrete. Two curing conditions were established: a conventional curing by water spraying and an extreme curing, in which a continuous air flow was generated, with temperature and humidity controlled in both cases. The curing was maintained for 7 days. Inspections were conducted after formwork removal to assess crack formation.</div> <div> </div> <div>After 28 days, the walls were subjected to a controlled loading process to induce residual cracks of 150 ± 20 μm. During this process, the behaviour of the walls was monitored with the instrumentation installed during construction. Additionally, movements and cracking were monitored with LVDTs and LDS. Two LVDTs were used to monitor head movement of the wall during loading, and two LDS were used to monitor potential foundation sliding. For crack formation monitoring, four LVDTs and one LDS were placed on the tension face in the crack formation area: two on each section, S1 and S2, one on the central section of the wall, S0, and two at a lower height in intermediate sections.</div> <div> </div> <div>Finally, the entire loading and cracking process was monitored through a Digital Image Correlation (DIC) system. Data from the instrumentation fed into the BIM model.</div> <div> </div> <div>Attached:</div> <div> <ul> <li><strong>PH_IFC4_rev01.ifc:</strong> the resulting IFC model (as-built) after testing.</li> <li><strong>PH_BIMx_rev01.bimx</strong>: the model and shrinkage results of the four walls tested at 1, 3, 9, 14, and 28 days.</li> <li><strong>Cracking and sealing wall images.zip</strong>: Images, taken with a digital microscope, along the main crack in each wall. These images show the different stages of cracking and sealing after self-healing periods with tap water for 75 days, followed by carbonated water (rich in CO₂) for an additional 75 days.</li> </ul> </div>
Identification of Precast Reinforced Concrete Elements in an Outdoor Storage Area
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