Consistency is the ability of freshly mixed concrete to flow. Pumpable concrete free download as powerpoint presentation. Pumpable concrete and concrete pumping sciencedirect. Work sequence for the construction of a vibro concrete column vcc. For given proportions of cement and aggregates without admixtures, the higher the slump, the wetter the mix. The presence of a lubricating film of mortar at the walls of the pipe also greatly reduces the friction high cement content in concrete is generally beneficial for pumping water is the only. Cook pumpable grout is an excellent cathodic protection grout utilizing a sacrificial anode.
Pumpable concrete concrete structural engineering scribd. Aalto university school of engineering department of civil engineering a. A somewhat larger change in consistency was measured by means of the mo consistency meter which is the best of these methods of measuring the remouldability of concrete. Pumped concrete construction aggregate concrete scribd. A simple method of concrete mix design for pumpable concrete based on an. Aci documents are requested to contact aci via the errata website at. When slump tests are to be made on a pumped concrete job. These are used to produce structural lightweight concrete with a freshly mixed unit weight of 90 to 120 pounds per cubic foot.
As a result, we changed the title of our report to assessing the impact of green concrete mixtures on building. Pdf guide to placing concrete by pumping methods guide to. For hand patching, a trowelfriendly mix was developed. The tables and figures presented are worked out by the author from a wide range of indian materials. Performancebased concrete pavement mix design system the final product of this track will be a practical yet innovative concrete mix design procedure with new equipment, consensus target values, common laboratory procedures, and full integration with both structural design and field quality control a lab of the future.
Assessing the impact of green concrete mixtures on building. This is a position on only one aspect of concrete pumping, informed by the collective experience of leading technical personnel in the industry. Tower crane use prohibited american concrete pumping. Introduction to concrete portland cement association. Pumpable grout is not designed to be expansive or to be used as a non. Guide to selecting proportions for pumpable concrete. Generally when filing concrete, you should use a rasp instead of a regular file because the larger teeth or grit on the rasp are better suited to the rough texture of the concrete. Development of mixture designs for pumpable concrete. However, the pumpable supports are very stiff, and unlike conventional concrete cribs, dont use wood to soften their response. Slump is a measure of concrete consistency or fluidity. Therefore, their residual load performance is the key to their effectiveness in this application. Classification of aggregates based on shape and size such as coarse and fine aggregates are discussed here, aggregates are the important constituents of the. Pumpable highstrength concrete with masterease basf. Development of mixture designs for pumpable concrete for extreme weather.
What one wants to measure in a tribology test is the friction of fresh concrete against a given surface type morinaga, 17. A steady supply of pumpable concrete, defined as a mixture that is capable of being pumped through a hose or pipe, is necessary for satisfactory pumping u. Vinyl concrete patch, applications from 116 to 14 2 mm to 6 mm requires the replacement of 1 qt of water with 1 qt of prospec b730 mortar acrylic additive. Incorporating special shrinkage compensating components to maintain contact. Departments of transportation us dots are trying to extend their construction funds while still providing long lasting and durable infrastructure. About four tons of concrete are produced per person per year worldwide and about 1.
A steady supply of pumpable concrete is necessary for satisfactory pumping. The importance of proportioning a pumpable concrete mixture. Mix design and pumped concrete civil engineering portal. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Evaluation of tests for determining the pumpability of concrete. Pumpable concrete is conveyed under pressure through a hose or a pipe. The design of concrete mix is not a simple task on account of the. When using type ip or sm blended cement in class dp and hp concrete, an addition of microsilica 71111 is required.
Designed to be placed by hand pump for infilling of horizontal and vertical joints between precast concrete elements. Nowadays it is widely used in infrastructure construction practices as it saves. Rock mass behavior and support response in a longwall panel. Rock mass behavior and support response in a longwall. Concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with predefined characteristics in the fresh and hardened states. Concrete technology 11 chapter general o ne of the ultimate aims of studying the various properties of the materials of concrete, plastic concrete and hardened concrete, is to enable a concrete. Request pdf mix design for durable and pumpable concrete using locally available materials concrete is the most popularly used construction material in bangladesh. Senior research engineer and chief rock safety engineer, respectively, pittsburgh research laboratory. Mix design and pumped concrete a simple method of concrete mix design for pumpable concrete based on an estimated weight of the concrete per unit volume is described in the paper. Tower crane use prohibited the source for concrete pumpers. Specific numerical guidelines are given as applicable to mixture component proportions that lead to the most efficient concrete pumping results. Departments of transportation us dots are trying to extend their construction funds. Type ip or sm blended cement replaces the portland cementpozzolan portion of the designed mix in class dp, g, gg, or hp. Pumpable concrete must be capable of being pushed under pressure through a pipeline as a cylinder, separated from the pipe wall by a lubricating layer of mortar water, cement, and sand.
Lightweight concrete is made using lightweight aggregates of expanded shale, clay and slag. Pumpability of concrete in relation to cement content and void content of. To obtain an alternative format, contact the office of. Chapter 9 designing and proportioning normal concrete mixtures selecting mix characteristics before a concrete mixture can be proportioned, mixture characteristics are selected based on the intended use of the concrete, the exposure conditions, the size. Concrete pump is a special machinery for transporting and pouring concrete, which it is equipped with a special pipe can be continuously fed into the pipeline along the concrete pouring site 1. Structural concrete structures reinforced concrete construction. Architectengineer to be a part of the contract documents, they shall be restated in. Commen ts are also included in this guide on how pumping affects the supplied concrete and how the proportions affect the concrete s pumpability. Excavated vcc column concrete placement for vcc column backfill material for the construction of vcc columns pumpable concrete is generally used with a consistency range of kr to kf and the strength classification c2025. One of the objectives of this study was to acquire additional data on loading response of the pumpable. A pumpable concrete, such as conventional concrete, requires good quality control.
The specified design strength of concrete is 30 mpa at 28 days measured on standard cylinders. Senior research engineer and chief rock safety engineer, respectively, pittsburgh research laboratory, national institute for occupational safety and health niosh, pittsburgh, pennsylvania. Ardex ermtm exterior ramp mortar ardex ermtm is a trowelgrade, polymermodified, portland cementbased structural repair mortar for horizontal applications. The importance of proportioning a pumpable concrete mixture is. Aerflowtm clsm is a lightweight, foamenhanced cementitious. Tribology of fresh concrete has, on the other hand, received very little attention from the concrete research community probably because it bears interest, for the moment, only to fresh concretes being. Designing and proportioning normal concrete mixtures. It is similar in appearance to concrete and is suitable for use as a topping or repair mortar concrete structures from 1 2.
It is the position of the american concrete pumping association that the material supplied be pumpable by the equipment ordered. As a result, we changed the title of our report to assessing the impact of green concrete mixtures on building construction. M80 grade of concrete design for a mean target strength of. Feb 23, 2014 the presence of a lubricating film of mortar at the walls of the pipe also greatly reduces the friction 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 two types of blockage to efficient pumping could occur.
Normal weight concrete is typically 5 to 150 pounds per cubic foot. See econo grout, general construction grout, dry pack grout features fast set time less. Contact prospecc technical services for state dot approvals. Fly ash increases the pumpability of concrete by making it more slippery. Hence pumpable concrete always works out more expensive than ordinary concrete. Pdf this guide discusses the use of pumps for transporting and placing concrete. Design mix manual for concrete construction, mcgraw hill book com pany. It is the position of the american concrete pumping association that the material supplied be pumpable by the equipment. Information on the properties of pumpable concrete canusa. Pumpable concrete 393 the change in consistency is of the same magnitude for wet slump 100150 mm and medium slump 50100 mm concrete.
A pumpable concrete, like conventional concrete mixes, requires good quality control, i. Introduction to concrete concretess versatility, durability, sustainability, and economy have made it the worldss most widely used construction material. Weber rep flow is a pumpable floawing surface concrete that provides a wearresistant finished concrete surface. However, the water demand of pumpable concrete is much higher. About four tons of concrete are produced per person.
Any descriptions, drawings, photographs, data, proportions, weights, etc. Incorporating special shrinkage compensating components to maintain contact within the filled section, it is a high strength mortar designed for structural support. This guide addresses methods for selecting proportions for hydrauliccement concrete placed by pumping. Designing and proportioning normal concrete mixtures, chapter 9. Therefore, their residual load performance is the key to their effectiveness in.
Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. Fourinch 4 slump is very common with normal weight concrete and is a good average slump for pumping. M80 grade pumpable concrete a mix of m80 grade suitable for pumped concrete is to be designed with the following materials and detail. Mix design for durable and pumpable concrete using locally. Concrete mix design definition concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with predefined characteristics in the fresh and hardened states. Vertical shaft kilns were replaced with rotary kilns and ball mills were used for grinding cement. If a concrete is made pumpable, it automatically means that mix is well graded and highly cohesive. Chapter 9 designing and proportioning normal concrete mixtures selecting mix characteristics before a. For given proportions of cement and aggregates without admixtures, the higher the. Type ip or sm blended cement replaces the portland cementpozzolan portion of the designed mix in class dp, g, gg, or hp concrete. Other uses would be filling voids by pouring or pumping mechanical or hand pump door jams, concrete block, etc. The report still covers construction rather than performance. There are some prevailing concrete mix design methods, for example, aci 211 and bs 812 which are.
Generally when filing concrete, you should use a rasp instead of a regular file. Other uses would be filling voids by pouring or pumping mechanical or hand pump door jams, concrete. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability. A concrete mix must be such that the concrete can pass through reducers in the pipeline system, and can go around bends in the line. Tribology of fresh concrete has, on the other hand, received very little attention from the concrete research community probably because it bears interest, for the moment, only to fresh concretes being pumped. The method is suitable for normal weight concrete with admixture. The proportions between the sorts aggregates and their quantities are establishing in table 5, so the grading curve of the final aggregate could be into the. Classification of aggregates based on size and shape. Concrete technology 11 chapter general o ne of the ultimate aims of studying the various properties of the materials of concrete, plastic concrete and hardened concrete, is to enable a concrete technologist to design a concrete mix for a particular strength and durability. Guide to selecting proportions for pumpable concrete author.
Concrete resurfacer 1rubcrete blendcrete 1 vinyl concrete patch features. Design a concrete mix for construction of an elevated water tank. Architectural surface finish pumpable, flowable selfconsolidating concrete. Assessing the impact of green concrete mixtures on. Rep flow is based on portland cement, sand and additives to achieve good flow properties.
You can file concrete to give it a more finished appearance, smooth out rough edges or even to create artistic sculptures. Requiring only the addition of water, eucocrete is a high strength material with an extended working time for ease of placement. Performance grouting solutions that challenge movement distributed by. Sometimes there is a risk of inadvertently using higher watercement ratio to. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Depending on the equipment, pumping rates will vary from 8 to 70 m3 of concrete per hour.
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