Effects of crushed stone waste as fine aggregate on mortar and concrete properties

Abstract

In this study, effects of crushed stone waste from Katunun’s quarry as fine aggregate on mortar and concrete properties will be examined. Samples with varying crushed stone waste replacement ratio, ranging between 0% until 100%, will be analysed at 3, 7 and 28 days curing time. Mortar sample is using 0.5 w/c ratio, while concrete sample is using 0.45 w/c ratio. The mixture of mortar sample is based on SNI 03-6825-2002, whilst concrete sample is based on SNI 03-2834-2000. The examination of concrete samples workability was conducted based on the slump test according to SNI 1972:2008. Moreover, the compressive strength test of mortar sample is based on SNI 03-6825-2002. In addition, the compressive strength test of concrete sample is based on SNI 1974:2011. Regarding compressive strength of mortar samples, the average compressive strength results of mortar with crushed stone waste rose significantly in line with the increase in replacement ratio. As for the workability of fresh concrete, sample using natural river sand had better workability compared to sample using crushed stone waste. However, the workability of concrete with crushed stone waste is still meet the slump value specified in the job mix formula. In addition, it has been found out that the combination of 75% crushed stone waste with 25% river sand will give the highest compressive strength compared to others combinations. Based on these findings, the utilization of crushed stone waste from Katunun’s quarry in mortar and concrete mixture can be proposed.

Properties of Mortars with Recycled Stone Aggregate for the Reconstruction of Sandstone in Historic Buildings

“…In order to avoid this, it is necessary to select the appropriate w/c ratio in mortars with recycled aggregate or to use suitable fluidizing admixtures. The positive effect of recycled aggregate on the strength of cement mortars and concretes has been confirmed by many studies available in the literature [43,[49][50][51][52]. Pavlik et al [43] observed that replacing 25% of natural sand with sandstone aggregate increased the compressive and bending strength of mortars by 15 and 4 (%), respectively, compared to the reference samples.…”

“…The authors attributed the increase in strength to a favorable hydration mechanism by creating a homogeneous and dense matrix structure between the aggregate and the slurry. On the other hand, the Prasetia-Maulan team [52] reported that the compressive strength of the mortar measured after 28 days increased along with the amount of waste. The complete replacement of natural river sand with stone waste at a w/c ratio of 0.5 increased the average compressive strength by as much as 80% compared to the sample without waste aggregate.…”

Influence of mineral raw material processing on the qualitative and quantitative indicators of crushed stone production

“…У сучасних європейських стандартах форму зерен оцінюють за «індексом форми», тобто за середнім відношенням найбільшого й найменшого розмірів зерен проби [31,32]. Таке оцінювання дає можливість робити висновки про форму усієї маси зерен щебеню.…”

Utilization of Fly Ash and Stone Dust to Improve the Compressive Strength of Mortar

“…Many studies have found that industrial waste can be used as cement or aggregate substitutes [3]- [8]. It has been reported that this waste is compatible as a substitute for cement and aggregate and gives sufficient and even greater compressive strength of concrete [9]- [13]. Moreover, utilizing this waste as a building material is not only for producing concrete but also for mortar, pavements, soil stabilization, etc.…”