نتایج جستجو برای: Cold Weather Concrete

تعداد نتایج: 221050  

J. Ahmed Naqash P. Narasimha Reddy,

Kashmir is located in a region where winter temperatures are very low. During the winter months, the temperature in Kashmir is often below 0⁰ C. Generally concrete placed in colder regions with the help of insulated forms as well as heaters to protect freshly mixed concrete against freezing. These practices try to incorporate unnecessary carbon and leads to an disagreeable carbon footprint. The...

2009
J. Ortiz A. Aguado L. Agulló T. García

This work has as objective to study the influence of mixing hour in the concrete properties such as workability and compressive strength in hot and cold weather conditions from an industrially applied point of view. The foremost studied variable was the concrete mixing hour, having used five mixing hours for every weather conditions. For each mixing hour, were carried out three concrete batches...

2005
John Kevern Muhannad T. Suleiman

Portland cement pervious concrete (PCPC) is increasingly being used in the United States in sidewalks and parking lots due to its benefits in reducing the amount of runoff water and improving water quality. In the United States, PCPC typically has high porosity and low strength, which has resulted in limited use of pervious concrete in hard wet freeze environments (i.e., the Midwest and Northea...

Hybrid fiber reinforced concrete (HFRC) consisting of two or more different types of fibers has been widely investigated because of its superior mechanical properties. In the present study, the effect of the addition of steel (0.25%, 0.5%, 0.75%, and 1% of concrete volume) and Polypropylene (0.2%, 0.4%, and 0.6% of concrete volume) fibers on the surface scaling resistance of concrete, depth of ...

Journal: :مهندسی عمران فردوسی 0
هرمز فامیلی محسن تدین محمدرضا خوش سیما

hot or cold weather condition affects the quality of the concrete in different ways, which one of them is increase or decrease in the initial temperature of the concrete. in this study, the impact of the initial temperature of the concrete on its quality in concrete kerbs made by dry pressing method with portland cement is examined. concretes with similar mix designs and initial temperatures of...

Journal: :Journal of the Korea Concrete Institute 2005

Journal: :Sustainability 2021

The City of Winnipeg (COW) and the University Manitoba (UM), Canada, have partnered since 2015 to conduct research on use portland limestone cement (PLC), comprising up 15% filler, in transportation infrastructure such as pavements bridges. Laboratory tests substantiated equivalent or superior resistance concrete made from PLC, relative that general (GU) (Type I) durability exposures including ...

Journal: :Journal of the Korean Society of Hazard Mitigation 2020

Journal: :iranian journal of pediatric surgery 0
afsaneh sadeghi pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran alireza - mirshemirani pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran ahmad khaleghnejad pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran naser sadeghian pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran javad ghoroubi pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran mohsen rouzrokh pediatric surgery research center, shahid beheshti university of medical sciences, tehran, iran

background : as recently some reported is investigated about relation between cold weather and testicular torsion (tt), so we decided to evaluate this hypothesis risk factor for testicular torsion in our children’s hospital. objectives : the aim of this study is to evaluate the relation between cold weather and testicular torsion in children. methods: from january 2011 todecember 2015 totally h...

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