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The Effect of Aggregate Properties on Concrete

Aggregate is classified as two different types, coarse and fine. Coarse aggregate is usually greater than 4.75 mm (retained on a No. 4 sieve), while fine aggregate is less than 4.75 mm (passing the No. 4 sieve). The compressive aggregate strength is an important factor in the selection of aggregate.

Volume change and strength characteristics of normal and ...

Volume change and strength characteristics of normal and high-strength mortars: effect of aggregate type and water-binder ratio Ali H. Nahhab1* and Ghaida Faeq A. Zahra1 Abstract: This study investigated the impact of aggregate type on the volume changes including drying shrinkage, autogenous shrinkage, and swelling for mor-

EFFECTS OF MAXIMUM SIZE COARSE AGGREGATE AND ...

rock composed of fine and coarse aggregates, water, Portland Cement and admixtures. The following material characteristics used in this study are listed below: 3.2 Aggregates 3.2.1 Maximum size of coarse aggregate In general, the effect of Variation in maximum size of coarse aggregate on concrete properties is well known. The

Effects of Aggregate Size, Shape, and Surface Texture on ...

the coarse aggregate predominates and in which fines are insufficient to fill the coarse aggregate voids are referred to as open-graded bituminous concrete mixtures. It seems evident that the characteristics of these mixtures will be a function of the character-istics of the predominant aggregate. Much has been written on aggregate grading and ...

Aggregates for Use In Concrete

Aggregate Size Effects: • As the maximum size aggregate increases, the amount of paste needed for a given slump decreases. • The maximum aggregate size used in a concrete mix is dictated by the size of the structural member and the spacing between reinforcing steel. "Design & Control of Concrete Mixtures," 14 th Edition, Portland Cement

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

aggregate and the cement paste. This effect was more pronounced when the type of aggregate with the finer pore structure was used. By testing the water absorption characteristics of lightweight aggregate, the present investigation clearly demontrates that a simple submersion type of test

THE CORRELATION BETWEEN AGGREGATE SHAPE AND …

investigate the effect of different type of coarse aggregate effect on the fresh and hardened Portland cement concrete behavior by a means of aggregate shape indexes such as aspect ratio, elongation, flatness, form factor, roundness, shape factor, and sphericity. The concrete produced with natural (uncrushed) river aggregate. Four different ...

Effect of Coarse Aggregate Content on Stone Matrix Asphalt ...

effects of coarse aggregate content on the properties of SMA mix­ tures were determined. The objective of this phase was to determine the effect of coarse aggregate content on SMA draindown and per­ formance in terms of rutting. EXPERIMENTAL PROGRAM To achieve the objective of this study, 12 SMA mixtures were tested.

-Effect of Recycled Coarse Aggregate …

Abstract:The experiment focused on the absorption and drainage characteristics of recycled coarse aggregate.The recycled coarse aggregate bonded with strain gauges was embedded in C30 strength grade concrete, and the shrinkage strain of recycled coarse aggregate in concrete during drying shrinkage was measured directly.

Effect of Size of Coarse Aggregate on Mechanical ...

Experimental studies were conducted to explore the effect of the size of the coarse aggregate on the mechanical properties and microstructure of a metakaolin-based geopolymer (MKGP) concrete and ordinary concrete. Three coarse aggregate size grades (5–10 mm, 10–16 mm, and 16–20 mm) were adopted to prepare the specimens.

Creep, shrinkage and permeation characteristics of ...

The long-term impact on creep, drying shrinkage, and permeation characteristics of an innovative concrete produced with manufactured geopolymer coarse aggregate (GPA) has been investigated and compared with quarried Basalt aggregate concrete. Microstructure and pore-structure development up to 1 year were examined through scanning electron microscopy, nanoindentation, …

Quality characteristics of fine aggregates and controlling ...

The effect of the porosity of the fine aggregate on the drying shrinkage exceeded twice the effect of the mix design changes, i.e. amount of paste and/or the admixtures. A program for predicting the interaction between the fine aggregate and concrete was developed.

Influence of aggregate materials characteristics on the ...

Limestone sand and blast furnace slag sand can reduce the mortar drying shrinkage. Coarse aggregate characteristics play an important role on the concrete drying shrinkage property. Coarse aggregate strain, specific surface area and pore structure of coarse aggregates are investigated.

Effect of Aggregate Roughness on Strength and Permeation ...

This paper aims to examine the effect of surface roughness of lightweight aggregate particles (LWA) on the strength and permeation characteristics of lightweight aggregate concrete (LWAC). Changing the smooth surface texture of LWA particles was achieved by applying surface polishing to make rough texture of the aggregate particle surface. LWAC mixes with different LWA …

(PDF) Effect of Coarse Aggregate Characteristics on Drying ...

Effect of Coarse Aggregate Characteristics on Drying Shrinkage of Concrete. Download. Related Papers. Effect of Coarse Aggregate Characteristics on Lateral Pressure Exerted by Self-Consolidating Concrete. By Kamal H Khayat. Variations of Lateral and Pore Water Pressure of Self-Consolidating Concrete at Early Age.

Effect of different substitution of natural aggregate by ...

The 24-h water absorption of single sized natural coarse aggregate was about 1.48 %. Recycled aggregate. For the single sized recycled coarse aggregate, the concrete with 28-day average compressive strength of 22.7 MPa was crushed at the two-stage crushing system including the integration of jaw and cone crushers (Fig. 1a, b).

Effect of aggregate size on the restrained shrinkage of ...

Zhang et al., 13 clarify experimentally the influence of the aggregate materials characteristics, which are coarse aggregate shrinkage strain, specific surface area of aggregate materials, water absorption ratio and pores structure of coarse aggregate, on the drying shrinkage property of mortar and concrete specimens. Based on the experimental

Effect of Recycled Aggregate Characteristics on Drying ...

The water absorption of the combined coarse aggregate was shown to be a good index to showcase the effect of RCA on shrinkage. Contour graphs were developed to determine the effect of RCA content and its key physical properties on 90-day drying shrinkage of concrete intended for rigid pavement construction.

(PDF) EFFECT OF COARSE AGGREGATE CHARACTERISTICS ON ...

The outcome of the study revealed that the strength, stiffness, and fracture energy of concrete for a given water/cement ratio depend on the type of aggregate The effects of content and particle size distribution of coarse aggregate on the compressive strength of concrete have been investigated (Meddah et. …

Influence of aggregate materials characteristics on the ...

This paper presents an experimental study to clarify the effect of various aggregate materials characteristics on the drying shrinkage property in mortar and concrete specimens incorporating fourteen kinds of fine aggregate materials (standard sand, natural sand, marine sand, various kinds of slag-type sand, and various kinds of crushed sand) and three kinds of coarse aggregate …

Concrete Technology in Focus - Master Builders Solutions

The effect of coarse aggregate on drying shrinkage is twofold. First, the use of a high coarse aggregate content will minimize the total water and paste contents of the concrete mixture and, therefore, drying shrinkage. The effects of aggregate-cement ratio and water-cement ratio on drying shrinkage are iIIustrated in Fig. 3. The figure

Aggregates for Concrete

coarse aggregate. There are several reasons for specifying grading limits and nominal maximum aggregate size; they affect relative. 82. Design and Control of Concrete Mixtures EB001. Fig. 5-4. Range of particle sizes found in aggregate for use in concrete. (8985) Fig. 5-5. Making a sieve analysis test of coarse aggregate in a laboratory. (30175 ...

Concrete Technology in Focus - BASF

The effect of coarse aggregate on drying shrinkage is twofold. First, the use of a high coarse aggregate content will minimize the total water and paste contents of the concrete mixture and, therefore, drying shrinkage. The effects of aggregate-cement ratio and water-cement ratio on drying shrinkage are iIIustrated in Fig. 3.

Water Absorption of Aggregate - CivilWeb Spreadsheets

The water absorption value for aggregates describes the percentage increase in weight between the dry aggregate and the saturated aggregate. Therefore the absorption value is the amount of water which the aggregates are able to hold. The absorption value can be ascertained using the water absorption test described in BS EN 1097-6 and should ...

Evaluation of coarse recycled concrete aggregates effect ...

This study presented is interested to identify the influence of the use of recycled concrete aggregates (RCA) on mechanical properties (compressive strength, tensile and Modulus of elasticity), rheological properties (workability, yield stress, and plastic viscosity), and total shrinkage of concrete. Coarse ordinary aggregates (COA) are partially substituted with RCA and an amount of ...

Experimental study of the effect of silica fume and coarse ...

The effect of matrix quality and coarse aggregate types in HSC were studied. • In the HSC, Quartzite and Andesite coarse aggregate significantly enhanced the fracture energy. • By decreasing the w/b ratio, and increasing silica fume content, the brittleness behavior of HSC is increased. •

Effect of Aggregate on Drying Shrinkage of Concrete ...

Aggregate accounts for a large volumetric rate within concrete and influences the properties of concrete. In this investigation, the effect of aggregate properties on drying shrinkage of concrete was examined. It had been thought before that aggregate plays a role in restraining the shrinkage of cement paste, and that the shrinkage of aggregate itself can be neglected.

Effect of coarse aggregate characteristics on hardened ...

The effects of coarse aggregate properties and characteristics on the properties of hardened concrete were examined in this experimental program. Tests were performed to determine effects on modulus of elasticity, compressive strength, splitting tensile strength, modulus of rupture, shrinkage, and coefficient of thermal expansion.

Influence of aggregate materials characteristics on the ...

Abstract. This paper presents an experimental study to clarify the effect of various aggregate materials characteristics on the drying shrinkage property in mortar and concrete specimens incorporating fourteen kinds of fine aggregate materials (standard sand, natural sand, marine sand, various kinds of slag-type sand, and various kinds of crushed sand) and three kinds of coarse aggregate ...

(PDF) Effect of Coarse Aggregate Characteristics on Drying ...

The characteristics of the interface zone largely govern the bond between cement paste or mortar and aggregate. The restraining effect of aggregate to drying shrinkage strain depends much on the ...

Creep and drying shrinkage characteristics of concrete ...

Request PDF | Creep and drying shrinkage characteristics of concrete produced with coarse recycled concrete aggregate | Laboratory tests are performed to investigate the effects …

Effect of Aggregate to Binder Ratio on Shrinkage and Creep ...

for all mixes was kept constant to magnify the effect of coarse lightweight aggregate only on the studied characteristics. Table 3 shows mix details. Standard ASTM procedures were used for casting and curing concrete specimens (100×100×100 mm cubes for compression …

Aggregate Characteristics: Factors - Globel Ask

Factors Contribute to Aggregate Characteristics Aggregate properties affects: Concrete mixture proportions Behavior of fresh and hardened concrete. Characteristics dependent on porosity, density, moisture absorption, strength, hardness, elastic modulus, and soundness. Characteristics dependent on prior exposure and processing factors: particle size, shape, and texture. Characteristics ...