Concrete Pumps and Concrete Pumping …
Pumping is an efficient, reliable and economical means of placing concrete, and sometimes the only way of getting concrete into certain locations. Other times, simply the ease and speed of pumping concrete make it the most economical method of concrete placement. In the end, the convenience of easy access for truck mixers must be weighed against the desirability of locating the pump closer to ...
High Performance Concrete - an overview | …
Besides the production of high-performance concrete, superplasticizers are also commonly used in the production of high-workability concrete. With a slump value of 180–230 mm, high-workability concrete can be pumped rapidly over long distances, easily compacted in structures with highly congested reinforcement, and can even be self-compacting (i.e., requiring no external compaction …
High Performance Concrete Topic
01.07.2020 · High-performance concrete (HPC) is concrete that has been designed to be more durable and, if necessary, stronger than conventional concrete. HPC mixtures are composed of essentially the same materials as conventional concrete mixtures, but the proportions are designed, or engineered, to provide the strength and durability needed for the structural and environmental requirements of the project. High-strength concrete …
Civil Engineering: HIGH PERFORMANCE CONCRETE
The workability of High Performance Concrete is normally good, even at low slumps, and High Performance Concrete typically pumps very well, due to the ample volume cementitious materials and the presence if stone admixtures. High Performance Concrete has been successfully pumped even up to 80 storeys. While pumping of concrete, one should have a contingency plan for pump breakdown. Super workable concretes …
HIGH PERFORMANCE CONCRETE - HPC
Definition - HPC P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials HPC classification • Normal Strength 20-50 MPa • High Strength 50-100 MPa • Ultra High Strength 100-150 MPa • Especial > 150 MPa. Microstructure MATERIALS USED IN HPC. Material Selection The main ingredients of HPC are almost the same as that of conventional concrete. These are: 1 ...
Production of High Performance Concrete
High Performance Concretes, Volume 2 Production of High Performance Concrete Paul Zia Michael L. Leming Shuaib H. Ahmad North Carolina State University Raleigh, North Carolina John J. Schemmel Robert P. Elliott University of Arkansas Fayetteville, Arkansas Strategic Highway Research Program National Research Council Washington, DC 1993. SHRP-C-362 ISBN 0-309-05621-7 Contract C-205 …
Concrete Pumping
Concrete Pumping In this month’s CI Special Products & Practice Showcase, ... The Mayco C-30HDN is a high-performance pump that’s ideal for a variety of shotcrete and grout applications. It features a direct-flow hopper design. The hopper is located directly above the primary pumping cylinder. Gravity draws the material directly from the hopper into the pumping cylinder, and it’s quickly ...
pumping concrete - YouTube
30.12.2017 · High cement content in concrete is generally beneficial for pumping Water is the only pumpable component in the concrete, and transmits the pressure on to the other components
High performance concrete; types and uses
Introduction High performance concrete is a concrete mixture, which possess high durability and high strength when compared to conventional concrete. This concrete contains one or more of cementious materials such as fly ash, Silica fume or ground granulated blast furnace slag and usually a super plasticizer. . The use of some mineral and stone admixtures like Silica fume and Super ...
Estimation of the Pumping Pressure from …
A new method is proposed to estimate pumping pressure based on concrete composition without experimental measurements. Previous studies show that the pumping pressure depends on the interface friction between concrete and the wall of the pumping pipes. This friction is determined by the thickness and the rheology of the boundary layer formed at the interface. The latter is mainly formed by water, cement, and fine sand particles which come from concrete…
High Performance Concrete - LinkedIn SlideShare
High Performance Concrete • High performance concrete (HPC) is a specialized series of concrete designed to provide several benefits in the construction of concrete structures that cannot always be achieved routinely using conventional ingredients, normal mixing and curing practices. In the other words a high performance concrete is a concrete in which certain characteristics are .developed ...
EFFECTIVE SELECTION OF PUMP FOR WATER AND CONCRETE …
B. Concrete Pump 1. Concrete pumping process types Fig. 3 Concrete Pumping There are two types of concrete pumping process are done Direct acting pumping system A majority of the concrete pumps are of the direct-acting. The operation of the direct- acting pump is simple. The concrete is fed into the pump by gravity
High-Performance Concrete, Chapter 17 - Memphis
High-performance concrete is often nomically made while used in bridges (left) and tall buildings (right). (70017, 70023) High-performance concrete (HPC) exceeds the properties and constructability of normal concrete. Normal and spe-cial materials are used to make these specially designed concretes that must meet a combination of performance requirements. Special mixing, placing, and curing ...
Concrete pumping - YouTube
10.01.2014 · Thursday, January 9 of 2014 was concrete-pumping day. This video begins that morning a few minutes before sunup. The workers have arrived, but the concrete …