effects of slag addition on the crushing strength of

Jan 01, 2018 · In Figure 8(a) for the specimen VA20 without slag, spalling is quite evident due to the dehydration of Ca[(OH).], whereas for the specimen VA20S10, only crushing (Figure 8(b)) was observed without spalling as addition of the slag resists the dehydration of mortar and forms new hydrated product.

In addition, the type of additional silica source (activator) is also one of the most important parameters affecting the strength development of GCSW (Luukkonen et al., 2018b). It is worth noting that there is almost no adverse effect on the early strength of the GCSW group (3 and 7 days) with FA: BFS of 1:1 and activator dosage of 25%, when ...

Stressstrain curve can accurately reflect the mechanical behavior of materials, and it is very important for structural design and nonlinear numerical analysis. Some cube and prism specimens were made to investigate the physical and mechanical properties of steel fiber reinforced alkali activated slag concrete (AASC); test results show that the strength, Young#x2019;s Elastic .

Jun 01, 2012 · The elements, having the same crystal structure as that of ferrite (cubic body centered – BCC), lower the A 4 point and increase the A 3 temperature.. These elements lower the solubility of carbon in austenite, causing increase of amount of carbides in the steel.. The following elements have ferrite stabilizing effect: chromium (Cr), tungsten (W), Molybdenum .

The effects of cement/fly ash ratios on the volcanic slag aggregate lightweight concrete masonry units. Masonry is one of the oldest construction materials, which was used for all kind of building appliions especially for sufficient compressive strength in combination with good acoustic and thermal properties with low construction costs and solving some durability problems.

In this study, the effect of dosage and modulus of activator on the strength of alkali activated slag and fly ash based geopolymer mortar is studied. Fly ash from Tingyi is used. Blast furnace slag from No (1) Iron and Steel Industry, Pyin Oo Lwin is used. NaOH and Na2SiO3 are used as alkaline activator.

Jun 26, 2013 · The low early strength of slag cement can be mitigated by physical, thermal and / or chemical activation, or through the incorporation of a high reactive addition, such as silica fume. Consequently, the high reaction rate of this addition combined with the stimulation effect on the portland cement hydration can partially offset the low ...

The influence of the fo the compressive strength of imentally: 1) Intergrinding of (cl 2) Separate grinding of ed by dry mixing bef 3) Separate grinding of lowing methods of adding the slag on mortar and concrete was studied expernker + gypsum) and slag. clinker + gypsum) and of slag, followre batching.

The 28 days compressive strength was noted by crushing the cube at 7, 14 and 28 days and it was found that performance of concretes with 0% and 25% replacement .show more content. In this paper we have studied compressive strength of concrete by replacing natural aggregate with recycled aggregate by 25%, 50% and 75%.This mixture formed in ...

Apr 12, 2013 · It has been found that concrete mixed with steelmaking slag has a compressive strength of 100 MPa and an excellent antichloride ion penetration performance. It has been observed that the ground EAF slag addition in concrete has performed an excellent waterreducing effect.

Jan 04, 2019 · Kwon, Y. J., quot;A Study on the AlkaliAggregate Reaction in High Strength Concrete with Particular Respect to the Ground Granulated Blast Furnace Slag Effect,quot; Cement and Concrete ...

Utilization of concrete wastes as aggregate in conventional concrete is regarded as a promising way of achieving sustainability within the builtup environment. This study investigated the performance of high strength concrete produced using recycled aggregate (RCA) with the addition of calcined clay in the concrete mixes. The recycled aggregate was sourced from .

Dec 04, 2019 · At present, many modifiion methods have been proposed to improve the performance of recycled aggregate concrete (RAC). In this study, tests on the compressive strength and damping properties of modified RAC with the addition of different proportions of recycled coarse aggregate (RCA) (0, 50, ), rubber powder (10, 15, 20%), steel fibre (5,, 10%) and fly ash (15, 20, 5%) are .

Dec 10, 2020 · Groundgranulated blastfurnace slag and dolomite are byproducts from the steel manufacturing and rock crushing industries, respectively. The addition of dolomite to a slagbased geopolymer matrix can improve its engineering properties and reduce disposal problems. This paper discusses the effect of alkali solution concentration, curing temperature and different proportions of .

The average compressive strength of water cured concrete was /mm 2 and N/mm 2 at 7 and 28 days respectively. Sprinkling method produced compressive strength close to immersion (Water) method produced a compressive strength of /mm 2 and /mm 2 at 7 and 28 days respectively. The development of higher ...