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Effect of biomineralization technique on the strength and ...

As aggregates in concrete are in higher volume, hence using construction and demolition waste (CDW) as recycled aggregate would make concrete construction more sustainable. In this study, the technique of biomineralization has been addressed to improve the strength and durability properties of recycled aggregate concrete (RAC).

Prediction of the Compressive Strength of Recycled ...

Heidari A et al. studied concrete production using waste bricks and conducted tests for compressive strength and bending strength. Tavakoli et al. [ 20 ] studied the replacement of sand in concrete by clay bricks, and the effects of concrete having its sand substituted by different ratios of …

EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON …

aggregate size. High-strength concrete containing basalt and normal-strength concrete ... There is much controversy concerning the effects of coarse aggregate size on concrete, principally about the effects on fracture energy. Some research (Strange and Bryant 1979, Nallathambi, Karihaloo, and Heaton 1984) has shown that there is an ...

SIZE EFFECT OF AGGREGATE IN THE MECHANICAL …

using concrete of high strength. the concrete structure in mix proportion of the different components together with the aggregate type and size determine the compressive. 1.1 Objectives The investigate for effects of aggregate size on the compressive strength of concrete, with particular reference; 1.

Effect of Modification of Recycled Concrete Aggregates on ...

In the case of concrete made of coated aggregates there is an increasing trend of compressive strength compared to the concrete without coating. Complete replacement of RCA reduces the compressive strength. After treating RCA with 10% cement slurry, concrete could achieve the required strength. Sl No.

EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH

2.1 Materials for concrete. 2.2 Aggregates introduction. 2.2.1 Fine Aggregate/Sand. 2.2.2 Coarse Aggregate/Granite. CHAPTER THREE. 3.0 Mixing of the concrete. CHAPTER FOUR. 4.0 Preparation for placing and compaction. 4.1 Curing. 4.2 Testing of hardened concrete and tabulation of …

EFFECT OF AGGREGATE SIZES ON CONCRETE STRENGTH

Concrete is one of the most widely used construction materials. The raw material from which it is prepared: cement, aggregates and water affect both the quality and cost of construction. Aggregates are usually cheaper than cement and constitute over 70% of the volume of concrete. The availability and proximity of aggregate to the construction ...

COARSE AGGREGATES IN HIGH STRENGTH CONCRETE

In the case of high-strength concrete, the effect of a weakened paste to aggregate bond can be extremely detrimental to strength. For this reason, use of clean, washed aggregate in the production of high-strength concrete is highly suggested.

Strength and Durability Evaluation of Recycled Aggregate ...

This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability of concrete.

Effect of aggregate properties on the strength and ...

Effect of volume fraction on elastic modulus for concrete using different aggregate type. To sum up, the compressive strengths and elastic moduli of lightweight aggregate concretes decrease with an increase in aggregates volume fraction and increase (except the volume fraction ratio of 18%) with an increase of aggregate strength. The strength ...

Effect of Aggregate-Cement Ratio on Engineering Properties ...

Future Scope. The study could further be extended by varying and introducing more parameters like grading in coarse aggregate. Use of other cementitious material like ultra fly ash cement, pozzolana with rice husk and formation of new pervious concrete by use of old recycled pervious concrete etc. and quantify their effect on overall permeability, compressive strength and porosity.

(PDF) Effect of Aggregate Type on Mechanical Properties of ...

Results show that the maximum aggregate size influences the compressive strength of the reactive powder concrete. A decrease from 1.2 mm to 0.045 mm in the maximum aggregate …

Effect of aggregate type on Compressive strength of concrete

The compressive strength of cement concrete depend upon the various factors at which production of concrete is made. They may be water cement ratios, properties of cement, properties of aggregates ...

Effect of recycled concrete aggregates on strength and ...

crete aggregate (RCA) on the rate of concrete compressive strength and stiffness gain with time and on the bond strength between seven-wire steel prestressing strand and concrete. The use of RCA did not have a significant effect on the rate of concrete compressive strength or stiffness gain, but it did have a small effect on the strand bond ...

EFFECTS OF RECYCLED AGGREGATES ON CONCRETE …

4.1.1 Workability of fresh recycled aggregate concrete 96 4.2 Properties of Hardened Recycled Aggregates Concrete 98 4.2.1 Compressive Strength 98 4.2.1.1 Effect of Replacement Percentage 98 4.2.1.2 Effect of Impurities contents 106 4.2.1.3 Effect of Site Production of RCA 108

Study of aggregate dormancy and its effects on the ...

changes in compressive strength over the years, dormant aggregate has no negative effect on concrete strength and quality of structural components but it is advised that any procured aggregates meant for construction should be totally free from clay and silt contents. This will enhance the concrete strength and also accelerate its setting time.

Effects of Different Fine Aggregate on Concrete Strength ...

Effects of Different Fine Aggregate on Concrete Strength. K. Maina, G. A.O, and K. D.O. Fine aggregate has been extensively used in the construction industry as a key component of concrete production. Although river sand is one of the major sources of fine aggregate, different sources exhibit different properties by virtue of the geological ...

Investigation of the effects of aggregate textural ...

The physical, mineralogical and textural properties of the aggregate, which constitute approximately 60%–80% of the concrete volume, affect the concrete compressive strength directly . The compressive strength values of the test samples produced with different types of …

Effect of the Aggregate Size on Strength Properties of ...

The study on preparation technology of recycled concrete with economical and technical feasibility has gained more serious attention in each country due to its involvement and effect on the environment protection and the sustainable development of human society. In this study, we conducted a control variable test to investigate and assess the influence of the aggregate size on the strength ...

Effects of Ground Granulated Blast Furnace Slag in ...

of 0%, 30%, and 50%. The primary concrete properties studied were compressive strength, split-tensile strength, and deicer scaling resistance. Material variations included four sources of ordinary portland cement and two types of coarse aggregate. Strength properties were studied at room temperature and 40°F mix and curing conditions.

Effect of very fine aggregate on concrete strength ...

The effect of very fine aggregate on the water requirement and strength evolution of superplasticized concrete was studied. The maximum aggregate size was 6 mm, fine aggregate content 0–15% of the total aggregate, binder (OPC and silica) content 80–800 kg m −3, and specific surface area of the finest aggregate material 18–1000 m 2 kg −1.The water requirement for constant workability ...

Effect of Aggregates on the Properties of Concrete ...

The bond strength depends upon the strength of cement paste and on the properties of aggregate surface as well. Bond strength is found to increase with the age of concrete. 2. Crushing Strength of Aggregate: The compressive strength of concrete cannot exceed that of the aggregate used therein.

Local Aggregate in Production of Concrete Mix in Jordan

Concrete properties such as unit weight and compressive strength are highly dependable on the properties of aggregate. Current research aims to study the effect of aggregate properties on concrete considering the resource of aggregate. The properties of aggregate and fine sand were studied (specific gravity, density, absorption, and abrasion).

Investigating the Effects of Coarse Aggregate Physical ...

effects on the strength of concrete. The four coarse aggregate samples have different physical properties and produced concrete having different compressive and flexural strength. Thus, it concludes, the compressive and flexural strength of concrete was greatly influenced by the physical properties and strength of coarse aggregate.

Effects of Aggregate Sizes on the Concrete Strength ...

Effects of Aggregate Sizes on the Concrete Strength Abstract. In the sense that the materials involved in this project were capital intensive more especially cement, so in carrying out the work one must have to be careful in the selection and collection of materials to be used in the casting of the concrete.

The Effect of Maximum Coarse Aggregate Size on the ...

Ghana for concrete production on the compressive strength of concrete. Coarse aggregate samples of maximum sizes of 10mm, 14mm and 20mm were used to produce concrete at constant water/cement ratio of 0.63. In all the experiments, the concreting procedures and materials were kept constant whiles the maximum coarse aggregate sizes were varied.

Effects of Coarse Aggregate Size on the Compressive ...

This study investigates the effect of aggregate size on the compressive strength of concrete. Two nominal mixes, that is, 1:2:4 and 1:3:6 were used in the study. Concrete cubes were produced with 6, 10, 12.5, 20 and 25 mm aggregates for the two nominal mixes and they were subjected to compressive strength test after curing for 7, 21, 28 and 56 ...

2. Five Ways Aggregate Can Affect The Strength Of Concrete

In high strength concrete, the compressive strength of concrete with aggregates having basalt are found to have higher strength than that of the aggregates with limestone, but the results are exactly opposite in normal strength concrete. So, the effect of aggregate contents do not seem consistent and are hard to generalize.

Factors Affecting Strength of Concrete - The Constructor

Factors Affecting Strength of Concrete Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete. Quality …

The Effects of Aggregates Characteristics on the ...

Aggregate shape, texture, and grading have a significant effect on the performance of fresh concrete. Aggregate blends with well-shaped, rounded, and smooth particles require less paste for a given slump than blends with flat, elongated, angular, and rough particles. At the same time, uniform gradings with proper amounts of each size

Cleaner production of concrete by using industrial by ...

Fig. 1 shows the number of articles published on the reuse of alternative aggregates in Cement and concrete research, Journal of cleaner production, and Cement and concrete composites over the six years. The increased research trend on alternative materials for fine aggregate is evident, and it is because of the extensive need for alternative aggregates in the construction industry.

Effect of water absorption by the aggregate on properties ...

While in Norway and most of Europe, the production of high-strength lightweight aggregate concrete is normally based on dry lightweight aggregate, prewetted aggregate is normally used in North America. Different moisture condition, and thus different water absorption by the aggregate, may affect …

How do aggregates affect concrete strength?

Then, how does the fineness modulus of aggregates affect the strength of concrete? Fineness Modulus is an indication grading of particle size. More the value of FM more coarser the aggregate is. Regarding your question, FM varying from 2.0 mm to 3.5 mm is labelled under fine aggregate while above it as coarse aggregate.Strength does not only depend on fineness Modulus of aggregate.