A simple method of concrete mix design for pumpable concrete based on an. 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. Departments of transportation us dots are trying to extend their construction funds while still providing long lasting and durable infrastructure. 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.
Any descriptions, drawings, photographs, data, proportions, weights, etc. Aalto university school of engineering department of civil engineering a. Designing and proportioning normal concrete mixtures, chapter 9. 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. You can file concrete to give it a more finished appearance, smooth out rough edges or even to create artistic sculptures. Structural concrete structures reinforced concrete construction. Classification of aggregates based on size and shape. Pumpability of concrete in relation to cement content and void content of. Type ip or sm blended cement replaces the portland cementpozzolan portion of the designed mix in class dp, g, gg, or hp.
The specified design strength of concrete is 30 mpa at 28 days measured on standard cylinders. Pumpable concrete free download as powerpoint presentation. 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. 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. Tower crane use prohibited american concrete pumping. The report still covers construction rather than performance. Senior research engineer and chief rock safety engineer, respectively, pittsburgh research laboratory. Senior research engineer and chief rock safety engineer, respectively, pittsburgh research laboratory, national institute for occupational safety and health niosh, pittsburgh, pennsylvania. Guide to selecting proportions for pumpable concrete. 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. The term concrete refers to a mixture of aggregates, usually sand. For given proportions of cement and aggregates without admixtures, the higher the. When using type ip or sm blended cement in class dp and hp concrete, an addition of microsilica 71111 is required. 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.
Development of mixture designs for pumpable concrete for extreme weather. Pdf guide to placing concrete by pumping methods guide to. What one wants to measure in a tribology test is the friction of fresh concrete against a given surface type morinaga, 17. Fly ash increases the pumpability of concrete by making it more slippery. Pumpable concrete 393 the change in consistency is of the same magnitude for wet slump 100150 mm and medium slump 50100 mm concrete. Pumpable concrete is conveyed under pressure through a hose or a pipe. With the given set of materials from various trials it was found that with opc 450 kgm 3, silica. See econo grout, general construction grout, dry pack grout features fast set time less. Aci documents are requested to contact aci via the errata website at. 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.
Information on the properties of pumpable concrete canusa. This is a position on only one aspect of concrete pumping, informed by the collective experience of leading technical personnel in the industry. Assessing the impact of green concrete mixtures on building. However, the water demand of pumpable concrete is much higher. Tower crane use prohibited the source for concrete pumpers. About four tons of concrete are produced per person per year worldwide and about 1. Guide to selecting proportions for pumpable concrete author. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability. Departments of transportation us dots are trying to extend their construction funds.
Mix design and pumped concrete civil engineering portal. Rep flow is based on portland cement, sand and additives to achieve good flow properties. Consistency is the ability of freshly mixed concrete to flow. Rock mass behavior and support response in a longwall. Normal weight concrete is typically 5 to 150 pounds per cubic foot. 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. For hand patching, a trowelfriendly mix was developed. Incorporating special shrinkage compensating components to maintain contact within the filled section, it is a high strength mortar designed for structural support. These are used to produce structural lightweight concrete with a freshly mixed unit weight of 90 to 120 pounds per cubic foot. Development of mixture designs for pumpable concrete for.
To obtain an alternative format, contact the office of. Therefore, their residual load performance is the key to their effectiveness in. As a result, we changed the title of our report to assessing the impact of green concrete mixtures on building. Mix design for durable and pumpable concrete using locally.
Ardex ermtm exterior ramp mortar ardex ermtm is a trowelgrade, polymermodified, portland cementbased structural repair mortar for horizontal applications. 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. Sometimes there is a risk of inadvertently using higher watercement ratio to. Pumpable concrete concrete structural engineering scribd. Designed to be placed by hand pump for infilling of horizontal and vertical joints between precast concrete elements. Development of mixture designs for pumpable concrete. Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. Other uses would be filling voids by pouring or pumping mechanical or hand pump door jams, concrete block, etc. It is the position of the american concrete pumping association that the material supplied be pumpable by the equipment.
Introduction to concrete portland cement association. If a concrete is made pumpable, it automatically means that mix is well graded and highly cohesive. There are some prevailing concrete mix design methods, for example, aci 211 and bs 812 which are. Assessing the impact of green concrete mixtures on. 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. Commen ts are also included in this guide on how pumping affects the supplied concrete and how the proportions affect the concrete s pumpability. A steady supply of pumpable concrete is necessary for satisfactory pumping. Architectural surface finish pumpable, flowable selfconsolidating concrete. Pumpable concrete and concrete pumping sciencedirect. Designing and proportioning normal concrete mixtures. Pumpable highstrength concrete with masterease basf. The tables and figures presented are worked out by the author from a wide range of indian materials.
Pumped concrete construction aggregate concrete scribd. About four tons of concrete are produced per person. Vertical shaft kilns were replaced with rotary kilns and ball mills were used for grinding cement. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Rock mass behavior and support response in a longwall panel. 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. However, the pumpable supports are very stiff, and unlike conventional concrete cribs, dont use wood to soften their response. Performance grouting solutions that challenge movement distributed by. One of the objectives of this study was to acquire additional data on loading response of the pumpable. Request pdf mix design for durable and pumpable concrete using locally available materials concrete is the most popularly used construction material in bangladesh. The method is suitable for normal weight concrete with admixture. Incorporating special shrinkage compensating components to maintain contact. Slump is a measure of concrete consistency or fluidity. For given proportions of cement and aggregates without admixtures, the higher the slump, the wetter the mix.
The importance of proportioning a pumpable concrete mixture. Hence pumpable concrete always works out more expensive than ordinary concrete. Pdf this guide discusses the use of pumps for transporting and placing concrete. Depending on the equipment, pumping rates will vary from 8 to 70 m3 of concrete per hour. Work sequence for the construction of a vibro concrete column vcc. Concrete resurfacer 1rubcrete blendcrete 1 vinyl concrete patch features. Contact prospecc technical services for state dot approvals. Cook pumpable grout is an excellent cathodic protection grout utilizing a sacrificial anode. Lightweight concrete is made using lightweight aggregates of expanded shale, clay and slag.
M80 grade pumpable concrete a mix of m80 grade suitable for pumped concrete is to be designed with the following materials and detail. The design of concrete mix is not a simple task on account of the. 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. 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. Weber rep flow is a pumpable floawing surface concrete that provides a wearresistant finished concrete surface. It is the position of the american concrete pumping association that the material supplied be pumpable by the equipment ordered. 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. 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.
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. Architectengineer to be a part of the contract documents, they shall be restated in. Chapter 9 designing and proportioning normal concrete mixtures selecting mix characteristics before a. The importance of proportioning a pumpable concrete mixture is. Specific numerical guidelines are given as applicable to mixture component proportions that lead to the most efficient concrete pumping results. M80 grade of concrete design for a mean target strength of. Nowadays it is widely used in infrastructure construction practices as it saves. Pumpable concrete means the concrete mix having small size of aggregates and having proportions. This guide addresses methods for selecting proportions for hydrauliccement concrete placed by pumping. Design mix manual for concrete construction, mcgraw hill book com pany. A pumpable concrete, like conventional concrete mixes, requires good quality control, i. Classification of aggregates based on shape and size such as coarse and fine aggregates are discussed here, aggregates are the important constituents of the. A pumpable concrete, such as conventional concrete, requires good quality control. Introduction to concrete concretess versatility, durability, sustainability, and economy have made it the worldss most widely used construction material.
Design a concrete mix for construction of an elevated water tank. Aerflowtm clsm is a lightweight, foamenhanced cementitious. It is similar in appearance to concrete and is suitable for use as a topping or repair mortar concrete structures from 1 2. 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. Pumpable grout is not designed to be expansive or to be used as a non. Fourinch 4 slump is very common with normal weight concrete and is a good average slump for pumping.
1527 989 605 373 1239 1255 914 1171 766 333 1271 65 284 1590 888 990 1183 898 546 586 104 1057 382 1219 21 14 1430 352 200 769 1388 360 517 732 765 1067 568 1017 898 994