recycled aggregate workability

Durability And Performance Characteristics Of Recycled Aggregate Concretethe recycled aggregate is relatively high compared to the reference basalt aggregate, there was no difficulty in achieving the desired consistency and subsequent compaction of concrete. Compressive strengths were determined on concrete cylinders continuously stored under moist conditions for up to .Towards Better Understanding of Concrete Containing .6. Discussion of Results 6.1. Workability The reduction in workability can be attributed to the increase in water demand which is difficult to predict [11, 22, 23].Similar to the results in Figure 1, Chen et al. [] found that the slump of recycled concrete is lower than that of normal concrete and that the tendency becomes more significant at low water/cement ratios.

Durability And Performance Characteristics Of Recycled Aggregate Concrete

the recycled aggregate is relatively high compared to the reference basalt aggregate, there was no difficulty in achieving the desired consistency and subsequent compaction of concrete. Compressive strengths were determined on concrete cylinders continuously stored under moist conditions for up to .Towards Better Understanding of Concrete Containing .6. Discussion of Results 6.1. Workability The reduction in workability can be attributed to the increase in water demand which is difficult to predict [11, 22, 23].Similar to the results in Figure 1, Chen et al. [] found that the slump of recycled concrete is lower than that of normal concrete and that the tendency becomes more significant at low water/cement ratios.(PDF) Properties of High-Workability Concrete with .Properties of High-Workability Concrete with Recycled Concrete Aggregate by testing Ø100 × 50 mm cylinder specimens according to the test procedure described in Safiuddin and Hearn 31 .

WORKABILITY AND COMPRESSIVE STRENGTH .

7/7/2015· Experimental results indicated that for concretes containing recycled coarse aggregates, as cleanliness of the recycled aggregate particles decreased, workability and compressive strength decreased, whereas air content increased.(PDF) "Recycled Aggregate Concrete as Structural .workability of the recycled aggregate concrete. Fig. 1 Recycled coarse aggregate composition 530 Materials and Structures (2007) 40:529–541 Portland cement CEM I 52.5R was used in all concretes ...Recycled Concrete as Aggregate for Structural Concrete .Recycled concrete aggregate was produced by crushing of ―old‖ concrete cubes used for compressive strength testing and one precast reinforced concrete column, .Recycled Concrete as Aggregate for Structural Concrete .Recycled concrete aggregate was produced by crushing of ―old‖ concrete cubes used for compressive strength testing and one precast reinforced concrete column, .Workability study of concretes made with recycled mortar .22/1/2013· The use of recycled aggregates (RA) for concrete production usually involves a reduction of the workability as measured by slump. This reduction is mainly due to higher absorption rates, rough-textured surfaces and particles with quite irregular shape from RA. Besides that, the slump test is a static test, whose result is influenced by its own weight and by internal friction between particles ...

ASTM International - Recycled Concrete—A Source for .

1/7/1984· The recycled aggregate concrete showed somewhat better workability characteristics than conventional mixes although its modulus of elasticity and durability characteristics were lower. It is proposed that satisfactory concrete can be made by recycling concrete as aggregate where disposal problems exist or where natural aggregate is either inaccessible or of inferior quality.Mechanical Properties Of Recycled Aggregates ConcreteCoarse recycled concrete aggregate (RCA) is produced by crushing sound, clean demolition waste of at least 95% by weight of concrete, and having a total contaminant level typically lower than 1% of the bulk mass. Other materials that may be present in RCA are gravel, crushed stone and .Utilisation of Recycled Aggregate as Coarse Aggregate in ConcreteRecycled aggregate concrete (RAC) is concrete made from recycled aggregate. It was found that the workability of fresh RAC decreases with an increase in recycled aggregate due to water absorption of mortar adhered to recycled aggregate [6].The strength of ...Utilisation of Recycled Aggregate as Coarse Aggregate in ConcreteRecycled aggregate concrete (RAC) is concrete made from recycled aggregate. It was found that the workability of fresh RAC decreases with an increase in recycled aggregate due to water absorption of mortar adhered to recycled aggregate [6].The strength of ...

ASTM International - Recycled Concrete—A Source for .

1/7/1984· The recycled aggregate concrete showed somewhat better workability characteristics than conventional mixes although its modulus of elasticity and durability characteristics were lower. It is proposed that satisfactory concrete can be made by recycling concrete as aggregate where disposal problems exist or where natural aggregate is either inaccessible or of inferior quality.EFFECT OF RECYCLED COARSE AGGREGATE ON WORKABILITY .The effect of replacement of natural granite aggregate with recycled coarse aggregate on shear strength and workability of FRHSC has been evaluated at length in this paper. Keywords : Cement, Natural fine aggregate, Natural coarse aggregate, Recycled aggregate, Water, super plasticizerPERFORMANCE OF RECYCLED AGGREGATE CONCRETEsuggesting no identifiable effect of RCA characteristics or source. The workability loss, in terms of compacting factor, of both recycled and natural aggregate concrete mixes was measured up to 150 minutes after casting, at 30 minutes intervals. The relationshipWorkability study of concretes made with recycled mortar aggregatecomparison with natural aggregate, is another factor that affects workability. In general, recycled mixtures willshowadecreaseofthe amountoffreewater [7,22, 29, 37]. Thus, to enhance the same workability, some researchers found that recycled concrete will needRecycled Aggregate Concrete - CivilArcFor the recycled aggregate concrete it will be important to include more cement in the concrete made with of recycled aggregate keeping in mind the end goal to accomplish an indistinguishable workability and compression strength from ordinary concrete.

Hot Products

Submit Demands Online