Limestone is the most common in the study region (Yucatán México). Five concrete mixes were produced with a water/cement ratio (w/c) of 0.5 and other five mixes with a w/c of 0.7. Five replacement rates of coarse aggregate by recycled coarse aggregate (%R) were used: 0, 25, 50, 75, and . OPC was used in all mixtures, …

The high cost of conventional building materials is a major factor affecting housing delivery in world. This has necessitated research into alternative materials of construction and analyzing flexural and compressive strength characteristics of concrete produced using crushed, granular coconut as substitutes for conventional coarse aggregate with full …

Crushing concrete to produce coarse aggregate for the production of new concrete is one common means for achieving a more environmentally friendly …

The uniaxial compression behavior of concrete with 0.98 to 3.15 in. (25 to 80 mm) large-size recycled coarse aggregate (LRCA) was numerically studied. Most of t

The early-age temperature rise in concrete, induced by cement hydration, poses a significant risk of thermal cracking. Accurate prediction of concrete hydration …

🕑 Reading time: 1 minute COARSE AGGREGATES IN HIGH STRENGTH CONCRETE. Given the critical role that the interfacial transition plays in high-strength concrete, the mechanical properties of coarse aggregate …

Post-filling coarse aggregate concrete (PFCC) is a new type of concrete that achieves energy-saving and emission-reduction goals through optimizing material proportions. The post-filled coarse aggregates can save the amount of cement material used, improve the strength and elastic modulus, prolong the service life of the material, …

Title: Coarse Aggregate and Self-Consolidating Concrete Passing Ability Author(s): J. McBride and D.J. Mukai Publication: Symposium Paper Volume: 233 Issue: Appears on pages(s): 77-96 Keywords: coarse aggregate; passing ability; self-consolidatingconcrete (SCC); stereology DOI: 10.14359/15835 Date: 3/9/2006 Abstract: …

Keywords: internal curing, recycled aggregate concrete, rheology, workability. DOI: 10.14359/51742018. Date: 6/18/2024. Abstract: It is known that the use of recycled coarse aggregates (RCA) can raise a variety of problems, which are mainly due to the porosity of the old mortar contained in RCA. One of the simpler ways to solve …

This research study investigates the effect of using recycled coarse aggregate (RCA) as a substitute of natural coarse aggregate (NCA) on the mechanical properties of concrete.

Title: Use of Relatively High Fe2O3 Steel Slag as Coarse Aggregate in Concrete Author(s): Hisham Qasrawi Publication: Materials Journal Volume: 109 Issue: 4 Appears on pages(s): 471-478 Keywords: compressive strength; density; steel slag; tensile strength; workability. DOI: 10.14359/51683922 Date: 7/1/2012 Abstract: Unprocessed steel slag …

be used as aggregate in concrete [3]. Recently, the CS as aggregate in concrete mixtures h as been evaluated by several authors. CS as coarse aggregate makes a change in concrete technology because some of it physical properties such as rigidity and impact strength [ 4]. CS as coarse aggregate has been proposed by several researchers.

The materials used for the preparation of the concrete mixes were Portland Ordinary Cement (OPC) purchased by a national supplier; water and coarse and fine …

The analysis was focused on the aggregate production for the concrete manufacture: fine and coarse aggregate, coming from crushed limestone, and …

Where, X= Fineness modulus of coarse aggregate, Y= Fineness modulus of fine aggregates, and Z= Economical value of fineness modulus for combined aggregate. The above formula will fix the proportion of fine aggregate to coarse aggregate. The percentage of the coarse aggregate is equal to 100 minus the percentage of fine …

The suitability of crushed clay bricks as coarse aggregate for concrete has been assessed by making a direct comparison of the basic properties with those of equivalent conventional concrete. Four basic mixes were chosen for crushed granite to achieve concrete with grades ranging from 30 to 60 MPa. The equivalent brick …

The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material, aggregate, and water. Aggregate is commonly considered inert filler, which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete. ... Aggregate is classified as two different types, coarse and fine. Coarse aggregate ...

Experimental work was performed to determine the compressive, splitting tensile, and flexural strengths of recycled coarse aggregate concrete and to compare them with those of concrete made using natural crushed stone. The properties of the aggregate were also compared. The fine aggregate for recycled and conventional …

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for …

A key point to remember is that aggregate constitutes about 60-75% of concrete's total volume. Aggregates comes in various forms, including fine and coarse aggregates, each imparting unique …

The Study of Periwinkle Shells as Fine and Coarse Aggregate in Concrete Works. 3rd International Conference on African Development Issues (CU-ICADI 2016), 361 – 364. Sourav G. and Moulik S.C. (2015). Use of Coconut Shell as an Aggregate in Concrete: a Review. International Journal of Scientific Engineering and Technology.

Aggregates having a size of more than 4.75 mm are said to be coarse aggregate. In another word; aggregates retained on a 4.75 mm sieve are coarse aggregate. Coarse aggregate provides the volume to …

The early-age temperature rise in concrete, induced by cement hydration, poses a significant risk of thermal cracking. Accurate prediction of concrete hydration temperature is essential for thermal cracking prevention. Cement hydration heat obtained from isothermal calorimetry has been applied to concrete temperature modelling by previous studies. …

Title: Strength of Recycled Concrete Made From Crushed Concrete Coarse Aggregate Author(s): Torben C. Hansen and Henrik Narud Publication: Concrete International Volume: 5 Issue: 1 Appears on pages(s): 79-83 Keywords: aggregate gradation; coarse aggregates; compressive strength; crushed concrete; fresh con-cretes; hardened …

The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for …

In this study, the selected natural coarse aggregate (NCA) was natural gravel (Fig. 1 (a)), and the particle sizes ranged from 5 to 12 mm, with a mass ratio of 8:15:7 (corresponding to 5–7 mm, 7–10 mm and 10–12 mm) by sieving.The fine aggregate (Fig. 1 (b)) was natural sand with a maximum particle size of 3 mm.The crushing …

Ever contemplate what materials go into making the concrete sidewalk you walk on? Concrete is comprised of an inert granular material called aggregate, along with water and cement. A coarse ...

Hydraulic cement concrete is a cement and water paste in which aggregate particles are embedded. Aggregate is granular material such as sand, gravel, crushed stone, blast …

Given a coarse aggregate source that yields a %voids =30, AC = 1% and a DRUW = 109.2 lbs/cf that is to be used in a concrete mixture which is designed to have a mortar factor of 0.6. Determine the weight of SSD coarse aggregate to produce 10 CY (270 cf) of concrete.

This guide presents information on the selection and use of normal weight aggregates in concrete. The selection and use of any aggregate in concrete should be b ... aggregate shape and texture; air entrainment; blast furnace slag; bleeding (concrete); coarse aggregates;concretes; crushed stone; density (mass/volume); fine aggregates; finishing ...