Properties of heavyweight concrete for structural and. Celfort and foamular high density insulation boards are available in a variety of thicknesses and standard sizes. In applications of concrete for shielding against hazardous radiation or for being used as counterweight, as well as in various other applications that involve the use of heavyweight concrete, the most significant method of mix design involves the use of heavyweight aggregates. Properties of concrete every civil engineer must know. For one of these aggregates which had a very fine pore structure, the. Tips for selection of materials for high strength concrete pdf. Ef 57,000 c concrete material properties effect of voids in concrete on modulus of elasticity, compressive strength, and flexural strength civl 1101. The chemical interaction between cement and water binds the aggregate into a solid mass. The thermal properties like coefficient of thermal expansion, specific heat, density and thermal conductivity of concrete are important for evaluation of the performance concrete over the period of time. Highperformance concrete specifications ideally should be performance oriented. Specific gravity is the ratio of the density of the substance to the density of water. Reduces the effectiveness of a 6 block thickness to the same as a 4 block.
The materials used to produce high strength concrete hsc should be of high quality to achieve designated concrete compressive strength. Not all properties can be achieved at the same time. Use of scc in high density concrete repairs targeted 4,000 kgm 3wet density. Concrete material properties for concretes up to about 6,000 psi it can be approximated as. High density concrete high density heavyweight density should be more than 2600 kgm3 dens crete offers more strength can be used everywhere, in all construction practices. High performance concrete seminar report, ppt, pdf for. Low density aggregate blocks low density aggregate blocks with enhanced thermal properties. The high density concrete has a better shielding property, so that it can. Heavyweight and high strength concrete can be used for shielding purposes if it meets the strength and radiation shielding properties. Material property characterization of ultra high performance concrete 6. Advantages disadvantages pennsylvania state university.
The required properties for concrete to be classified as high performance therefore depend on the properties of normal concrete. Today compressive strengths exceeding 20,000 psi 140 mpa have been used in castinplace buildings. High density concrete, high strength concrete and high performance concrete. Following properties of high density concrete have been observed. Highdensity concretes range from 190 to 260 lbscu ft.
High performance concrete may be defined as concrete with strength and durability significantly beyond those obtained by normal means. Explore high performance concrete with free download of seminar report and ppt in pdf and doc format. Production of an economic highdensity concrete for shielding. The fire resistance of concrete masonry walls depends on the geometry of the concrete masonry units, and the density of the concrete block. High density concrete high densityheavyweight density should be more. Compressive strengths from 30 psi to 100 psi 210 kpa to 690 kpa to meet the requirements of nearly every application.
Highperformance concrete an overview sciencedirect topics. Lightweight concrete an overview sciencedirect topics. In addition to the use of mineral and chemical admixtures, applying presetting pressure and using postsetting heat treatment can also be used to produce dense microstructure. Foam concrete is differentiated from air entrained concrete in terms of the volume of air that is entrained. Groundbreaking system of dry stacked shielding modules which interlock to form a tight, leakfree therapy room of any size or shape. The standard sizes of interlocking high density concrete blocks are 4 x. Concrete material properties the weight density of reinforced concrete using normal aggregates is about 150 lbft3 pcf. Compressive strengths from 30 psi to 100 psi 210 kpa to 690 kpa meet the requirements of nearly every application. Pdf mechanical properties of highdensity polyethylene. The strength of this concrete measured on standard cylinders has been found 42 mpa at 28 days for a water cement ratio 0. The dry density of foamed concrete may vary from 300 to 1600 kgm3. High performance concrete is often nomically made while used in bridges left and tall buildings right.
Not only does high strength concrete allow for more applications, it also increases the strength per unit cost, per unit weight, and per unit volume as well. Results of the characteristics of different grades of concrete using mix design method are discussed in terms of density, compressive strength, flexural strength and workability. High density concrete blocks marshield custom radiation. The necessity of high performance concrete is increasing because of demands in the. Its properties make concrete an excellent choice for structures, cladding systems and floor slabs. Grout materials will have a lesser compressive strength as water content is increased for working properties, but shall not be less than 2,800 psi when mixed on site. Airtec aerated concrete blocks exceptionally high performance blocks with the lowest thermal conductivity of any masonry block available in the uk. On the other hand, concrete is widely used for radiation shielding. Higher strengths can be produced with the addition of supplementary cementitious materials. A normal weight concrete weighs 2400 kg per cubic meter or. High strength concrete is made by lowering the water cement wc ratio to 0. Under the standard, these four properties serve as the basis for classifying a concrete block masonry unit, and for describ. High density concrete is widely used in railway, crane counterweight, radiation shielding in nuclear plants or other radiation related application in medical establishment. The density of the sdc combined with the extremely high concentration of reinforcement was 2,240 kgm3 140 lbft3.
High density concrete the heavyweight of all concretes. Over 35% less effective in preventing radiation streaming. Due to low wc ratio it causes problem of placing,to overcome from this superplasticizer used. Nov 26, 20 high density concrete, high strength concrete and high performance concrete.
Highstrength concrete resists loads that cannot be resisted by normalstrength concrete. High density concrete properties for structural shielding ok free download as pdf file. High density concrete is used extensively in nuclear power plants for radiation shielding against biological hazards. High strength concrete resists loads that cannot be resisted by normalstrength concrete. In this paper, we will discuss our final prototype. Hence, it is intended for use by engineers familiar with the design of concrete structures using particularly cp65 but who have little or no experience of high strength concrete hsc. If 5 pcf of this is allowed for the steel and w is taken as 145 pcf then. Pdf properties of concrete at elevated temperatures. Material property characterization of ultrahigh performance. High quality materials meet the performance criteria for workability, strength, durability, and other properties. Also explore the seminar topics paper on high performance concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Development of high performance heavy density concrete using.
Bickley and fung 2001 demonstrated that 40 mpa 6,000 psi high performance concrete for bridges could be ecofig. Pdf neutron shielding properties of a new highdensity. Development of highperformance heavy density concrete. High density concretes range from 190 to 260 lbscu ft. The knowledge of thermophysical properties of materials is essential for designing nuclear power plants npp. Density and strengths can be controlled to meet specific structural and. High density aggregates are the key ingredient in high density concrete. High strength concrete has a compressive strength greater than 40 mpa. Portland cement association with steel or other high strength material is known as reinforced concrete.
Properties such as density and refractive index are measured on both fibers and bulk samples, in annealed or unannealed form. Ultrahigh strength concrete mixtures using local materials. Chindaprasirt, in ecoefficient masonry bricks and blocks, 2015. High density concrete is a concrete having a density in the range of 6000 to 6400 kgcu. The strength of this concrete measured on standard cylinders has been found 42 mpa at 28 days for a watercement ratio 0. Properties of high density concrete astm international.
Have high flow properties optimize density be stable no segregation prevent or mitigate shrinkage reduce the overall labourcomponent schedule use of scc in high density concrete repairs. Apr 08, 2018 properties of concrete are controlled and influenced by the various factors, out of them mix proportions plays an important role in concrete strength and these proportions control the properties of strength. Heavyweight concrete is made and transported much like traditional ready mix concrete, but due to its high density and weight properties, it is usually transported in smaller amounts. Effect of water absorption by the aggregate on properties of. Pdf this paper deals with the characterization of typical high density concrete used in fast reactors for structural and shielding purposes. When using only magnadense as a high density aggregate, concrete with densities up to 4. This permits volumetric changes to ta ke place more uniformly throughout the concrete. Highstrength concrete has a compressive strength greater than 40 mpa. Pdf mechanical properties of high density concrete used in fast. Workers placing and vibrating concrete on a bridge deck including epoxycoated reinforcing steel. This article describes the experimental determination of the thermal material properties of normal, high and ultra. Four physical properties for a concrete block masonry unit are identified by the csa a165. High density concrete is mainly used for the purpose of radiation shielding, for counterweights and other uses where high density is required. The unit geometry affects the effective or equivalent unit thickness.
High density concrete is also known as heavy weight concrete. Such concrete that normally utilizes magnetite aggregate can have a density in the range of 3. For example, researchers are using silica fume and high range water reducing admixtures to produce high density concrete. High density concrete, high strength concrete and high performance. Lightweight concrete can weigh as little as 95 lbscu ft. High density concrete high densityheavyweight density should be more than 2600 kgm3 dens crete offers more strength can be used everywhere, in all construction practices resistant to extreme weather 2. Unfortunately, many specifications are a combination of performance. Density of concrete density of fresh concrete made of normal aggregate, barites aggregate and steel fiber shown in figure1. Because of the deep water, 345m 1 ft, above the heidron oil fields, a decision was made to construct the first floating platform with high strength low density concrete hssdc. The compressive strength of foam concrete determined at 28 days, ranges from 0. The most common aggregates used to achieve the required densities are hematite fe2o3, ilmenite feo tio2, magnetite fe3o4 and steel aggregate. View high density concrete research papers on academia.
Density and specific gravity density is the weight per unit of volume of a substance. Pdf designing of high density concrete by using steel. Cip 33 high strength concrete what is high strength concrete it is a type of high performance concrete generally with a specified compressive strength of 8,000 psi 55 mpa or greater. High density concrete by pitts little radiation shielding. Pdf production of an economic highdensity concrete for shielding. The neutron shielding properties of a new high density concrete commercially available under the name hormirad, developed in spain by the company ctrad have been characterized both experimentally and by monte carlo calculations. This design guide serves to extend the use of concrete beyond grade 60 in the design of concrete structures using cp65. Properties of different grades of concrete using mix design. The properties of fine aggregate are shown in table ii. High density concrete blocks learn more about high density concrete blocks 2 approx. The required properties for concrete to be classified as high performance therefore depend on the properties of normal concrete achievable at a particular time and location. For a given unit configuration, the fire resistance of a concrete masonry wall increases as the concrete density decreases.
It is known that to call a concrete as high density concrete it should have density more than 2600 kgm3 density. High density concrete, high strength concrete and high. Highdensity concrete as a general term has been used for years. Properties of concrete are controlled and influenced by the various factors, out of them mix proportions plays an important role in concrete strength and these proportions control the properties of strength. To provide detailed properties of the concrete, this study also discusses two heavy concrete types s50 and s100 from scientific publication designing of high density concrete by using steel. Concrete is a mixture of cement, fine and coarse aggregates, water, and sometimes some supplementary materials like fly ash, slag, and various admixtures. Dense concrete blocks highly resilient, tough, loadbearing blocks suitable for any application. Lightweight concrete can be classed according to its unit weight or density, which normally ranges from 320 to 1920 kgm 3, according to the aci committee 2 guide for structural lightweight aggregate concrete aci 2, 2001. The properties presented in tables 2 and 3 are representative of the compositional ranges in table 1 and correspond to the following overview of glass fiber properties. Such concrete that normally utilizes magnetite aggregates can have a density in the range 3.
Physical and mechanical properties density, compressive and tensile strength, freezethaw resistance and others were determined for obtained concrete. Unique sinewave shapes eliminate straight line seams and provides superior neutron, photon and particle attenuation at the joints. High density concrete properties for structural shielding scribd. C for a period of time sufficient to reach a density that changes less than 0. Pdf designing of high density concrete by using steel treatment. The neutron shielding properties of a new highdensity concrete commercially available under the name hormirad, developed in spain by the company ctrad have been characterized both experimentally and by monte carlo calculations. High performance cellular concrete high performance cellular concrete hpcc has all the properties of cellular concrete and can achieve 55. Properties of highdensity polyethylene fiber concrete, international journal of civil engineering and technology ijciet 910, 2018, pp. The density of concrete is a measure of its unit weight.
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