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21/1/2018 · Reinforced concrete column is an important type of concrete element in a concrete building especially high-rise structure. It is highly recommended that a design of concrete column is to prioritize before the design of other concrete elements of a building. Perhaps you have noticed that there were some concrete buildings have collapsed during its construction that is maybe because of design
26/11/2015 · SECTION 5.01 CONCRETE MIXES AND TESTING 5.01.1 SCOPE The works covered in this Section consists of the specifications for concrete materials including sampling, testing and storage of such materials, concrete strength requirements, 5.01.2
A concrete pump is a machine used for transferring liquid concrete by pumping.There are two types of concrete pumps. The first type of concrete pump is attached to a truck or longer units are on semi-trailers. It is known as a boom concrete pump because it uses a remote-controlled articulating robotic arm (called a boom) to place concrete accurately.
One challenging aspect of the project was to remove an existing column between Levels 1 and 2 located in the middle of the redesigned lobby (Figure 1). This column removal is the primary focus of this article. Figure 1. The building's structural system is a steel moment frame. The gravity system consists of a cinder concrete topping slab over
🕑 Reading time: 1 minute Honeycomb is a rough and stony concrete appearance with air spaces between aggregates. It may occur due to improper concrete workability and concrete pouring practice, excessive water in the concrete mix, inadequate formwork rigidity and waterproofing, etc. It is found mostly in beam-column junctions, corners, inaccessible areas where proper compaction […]
The purpose of this alert is to highlight the hazards and risks to workers caused by hose whip on concrete pumps. 'Hose whip' describes the uncontrolled and rapid motion of the flexible rubber hose on the end of a concrete placement boom or other concrete delivery line. The following information is provided to assist employers, self-employed people, principal contractors, clients and project
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65 Chapter 5. Concrete Design and Construction Details David W. Kammel, Professor, Biological Systems Engineering Department, University of Wisconsin Cooperative Extension Concrete design involves three steps. 1. Specifying the proper concrete mix. 2.
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Precautions during Concrete Pouring. The ACI 304R-00 has provided several precautions for pouring concrete which include: The time between adding water to dry mixture and concrete pouring should not exceed 30minutes for normal condition where temperature is no greater than 30 degree. However, this time would decrease to 20mintues in hot weather
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CONCRETE DELIVERY STRENGTH TESTING: CONCRETE CUBE TEST The compressive strength defined the quality of the concrete and for reference of striping formwork. Test cubes should be stored in curing tank. And testing on 1st, 3rd, 7th and 28th
25/5/2017 · It was also considered economic to pump relatively small quantities of C50 concrete for metal deck composite slabs above the 586 m concrete core rather than use cranes, adding a further 5 m to the record in April 2008. For a 48 m 3 slab using 3 m 3 skips with a 30 min transit time, the maximum casting rate would be 12 m 3 /h and would require two cranes full time for 4 h.