Download Temperature Changes And Thermal Cracking In Concrete Pavements At Early Statees By Jg Hunt full books in PDF, epub, and Kindle. Read online Temperature Changes And Thermal Cracking In Concrete Pavements At Early Statees By Jg Hunt ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Temperature Changes and Thermal Cracking in Concrete Pavements at Early Statees [by] J.G. Hunt by : J. G. Hunt
Download or read book Temperature Changes and Thermal Cracking in Concrete Pavements at Early Statees [by] J.G. Hunt written by J. G. Hunt and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rural and Urban Roads written by and published by . This book was released on 1972 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Laboratory Study of Early-age Thermal Cracking of Concrete by : J. G. Hunt (engineer.)
Download or read book A Laboratory Study of Early-age Thermal Cracking of Concrete written by J. G. Hunt (engineer.) and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
This report describes the use of tables developed to help determine problems that may result from early thermal effects in concrete. The thermal behavior of concrete can be estimated from a knowledge of concrete temperature, air temperature, type of cement, and content of cement in the mixture. The thermal effects tables can be used to predict whether too high a temperature will be reached in the pavement; whether early thermal cracking will result from larger differences between the temperature of the concrete slab and the temperature of either the air or the base; or whether there is a risk of early cracking of the concrete. Examples of the use of the table are given along with guidelines for avoiding undesirable thermal effects.
Book Synopsis A Guide to Evaluating Thermal Effects in Concrete Pavements by : Per Just Andersen
Download or read book A Guide to Evaluating Thermal Effects in Concrete Pavements written by Per Just Andersen and published by . This book was released on 1993 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the use of tables developed to help determine problems that may result from early thermal effects in concrete. The thermal behavior of concrete can be estimated from a knowledge of concrete temperature, air temperature, type of cement, and content of cement in the mixture. The thermal effects tables can be used to predict whether too high a temperature will be reached in the pavement; whether early thermal cracking will result from larger differences between the temperature of the concrete slab and the temperature of either the air or the base; or whether there is a risk of early cracking of the concrete. Examples of the use of the table are given along with guidelines for avoiding undesirable thermal effects.
This study investigates experimentally and numerically the addition of microencapsulated phase change materials (PCMs) into concrete pavements at early ages to limit (i) temperature rise caused by cement-water hydration, (ii) cooldown rate, and (iii) the associated risk of thermal cracking. First, the effect of water-reducing admixture (WRA) on the heat generation rate from cement hydration was quantified using isothermal calorimetry. Second, large cubic PCM-mortar composite specimens representative of a common pavement geometry were prepared and placed in an environmental test chamber simulating realistic diurnal conditions. The results showed that the presence of PCM can reduce considerably the temperature rise and cooldown rate across the cementitious composite section within the first 24 hours following placement provided the PCM melting temperature is selected carefully. This was in spite of the fact that the lower thermal conductivity of PCM-composites inhibited heat dissipation. A transient 1D thermal model of pavement section was developed to simulate the temperature evolution and the rate of change in temperature within PCM-mortar composite sections. Good agreement was found between model predictions and experimental measurements. In addition, a parametric study was carried out to assess the effects of the PCM melting characteristics (temperature, temperature window, latent heat) on local temperature in PCM-mortar composites. The constitutive relationships and the numerical model developed as part of this study can be used to inform the design of concrete pavements containing PCMs for early-age crack resistance.
Book Synopsis Early-Age Temperature Development in Concrete Pavements Containing Microencapsulated Phase Change Materials by : ZHENYU SHE
Download or read book Early-Age Temperature Development in Concrete Pavements Containing Microencapsulated Phase Change Materials written by ZHENYU SHE and published by . This book was released on 2018 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates experimentally and numerically the addition of microencapsulated phase change materials (PCMs) into concrete pavements at early ages to limit (i) temperature rise caused by cement-water hydration, (ii) cooldown rate, and (iii) the associated risk of thermal cracking. First, the effect of water-reducing admixture (WRA) on the heat generation rate from cement hydration was quantified using isothermal calorimetry. Second, large cubic PCM-mortar composite specimens representative of a common pavement geometry were prepared and placed in an environmental test chamber simulating realistic diurnal conditions. The results showed that the presence of PCM can reduce considerably the temperature rise and cooldown rate across the cementitious composite section within the first 24 hours following placement provided the PCM melting temperature is selected carefully. This was in spite of the fact that the lower thermal conductivity of PCM-composites inhibited heat dissipation. A transient 1D thermal model of pavement section was developed to simulate the temperature evolution and the rate of change in temperature within PCM-mortar composite sections. Good agreement was found between model predictions and experimental measurements. In addition, a parametric study was carried out to assess the effects of the PCM melting characteristics (temperature, temperature window, latent heat) on local temperature in PCM-mortar composites. The constitutive relationships and the numerical model developed as part of this study can be used to inform the design of concrete pavements containing PCMs for early-age crack resistance.
Download or read book Register of Research written by and published by . This book was released on 1975 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A laboratory study of early-age thermal cracking of concrete by : J.G. Hunt
Download or read book A laboratory study of early-age thermal cracking of concrete written by J.G. Hunt and published by . This book was released on 1971 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Early Age Thermal Cracking of Concrete Road Slabs by : John Gratland Hunt
Download or read book The Early Age Thermal Cracking of Concrete Road Slabs written by John Gratland Hunt and published by . This book was released on 1970 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magazine of Concrete Research written by and published by . This book was released on 1977 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis HRIS Abstracts by : National Research Council (U.S.). Highway Research Information Service
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1974 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: