Ordinary fine aggregates, that we use while mixing the concrete, were partially replaced by stone dust sludge to investigate concrete fluidity, strength behaviors, and packing density. To determine the influence that stone dust sludge have on concrete fluidity and strength, stone dust sludge mortar ...
Ordinary fine aggregates, that we use while mixing the concrete, were partially replaced by stone dust sludge to investigate concrete fluidity, strength behaviors, and packing density. To determine the influence that stone dust sludge have on concrete fluidity and strength, stone dust sludge mortar and concrete fluidity, and strength were investigated through experimental tests. Note that the stone dust sludge quantity was related to fine aggregate weight. The Test results revealed that as stone dust sludge amount increased stone sludge mortar fluidity decreased. The compressive strength of stone dust sludge specimen in 28 days increased about 2.2%, and the flexural tensile strength also increased about 6.8%. Besides, Results also showed that as the amount of stone dust sludge increased the stone dust sludge concrete fluidity decreased. The maximum increment of compressive strength of stone dust sludge specimen in 28 days was about 19.7%, that of split tensile strength reached to 13.9%. To compensate this reduction in fluidity due to the mixing with stone dust sludge, fly ash, superplasticizer, air entraining admixtures were used, and their influences on fluidity and strength development were examined. The following results came out while adding fly ash and superplasticizer into the stone dust sludge concrete mixture. As the fly ash amount rose up the stone dust sludge concrete fluidity increased. The maximum increment of compressive strength of stone dust sludge specimen in 28 days was about 21.8%, that of split tensile strength reached to 6%. In addition, while the air entraining admixture was added into the stone dust sludge concrete mixture, as the air entraining admixture augmented, the fluidity also increased. The maximum compressive strength of stone dust sludge specimen in 28 days was about 50.8%, split tensile strength increased up to 0.9%. When stone sludge fine particles were mixed, mortar and concrete packing density were analyzed. In the case of stone dust sludge mortar, when the stone dust sludge replacement ratio reached 24% the packing density increased and the maximum packing density was r = 0.773. In the case of stone dust sludge concrete, when the stone dust sludge replacement ratio reached 35% the packing density increased. By taking the global results, it was concluded that when stone dust sludge replacement ratio reached 30%, the compressive strength increased. When the amount of fly ash is 30%, superplasticizer 0.45%, air-entraining admixture 0.03%, the results are similar. Therefore, the concrete matrix where 30% of fine aggregate weight was replaced by stone dust sludge, and where fly ash, superplasticizer, and air-entraining admixtures were used, can be designed similarly to the ordinary concrete. Due to waste recycle, it should be necessary to be maintaining the nature conservation and its creative value. key word : stone dust sludge, fluidity, age of strength, replacement rate
Ordinary fine aggregates, that we use while mixing the concrete, were partially replaced by stone dust sludge to investigate concrete fluidity, strength behaviors, and packing density. To determine the influence that stone dust sludge have on concrete fluidity and strength, stone dust sludge mortar and concrete fluidity, and strength were investigated through experimental tests. Note that the stone dust sludge quantity was related to fine aggregate weight. The Test results revealed that as stone dust sludge amount increased stone sludge mortar fluidity decreased. The compressive strength of stone dust sludge specimen in 28 days increased about 2.2%, and the flexural tensile strength also increased about 6.8%. Besides, Results also showed that as the amount of stone dust sludge increased the stone dust sludge concrete fluidity decreased. The maximum increment of compressive strength of stone dust sludge specimen in 28 days was about 19.7%, that of split tensile strength reached to 13.9%. To compensate this reduction in fluidity due to the mixing with stone dust sludge, fly ash, superplasticizer, air entraining admixtures were used, and their influences on fluidity and strength development were examined. The following results came out while adding fly ash and superplasticizer into the stone dust sludge concrete mixture. As the fly ash amount rose up the stone dust sludge concrete fluidity increased. The maximum increment of compressive strength of stone dust sludge specimen in 28 days was about 21.8%, that of split tensile strength reached to 6%. In addition, while the air entraining admixture was added into the stone dust sludge concrete mixture, as the air entraining admixture augmented, the fluidity also increased. The maximum compressive strength of stone dust sludge specimen in 28 days was about 50.8%, split tensile strength increased up to 0.9%. When stone sludge fine particles were mixed, mortar and concrete packing density were analyzed. In the case of stone dust sludge mortar, when the stone dust sludge replacement ratio reached 24% the packing density increased and the maximum packing density was r = 0.773. In the case of stone dust sludge concrete, when the stone dust sludge replacement ratio reached 35% the packing density increased. By taking the global results, it was concluded that when stone dust sludge replacement ratio reached 30%, the compressive strength increased. When the amount of fly ash is 30%, superplasticizer 0.45%, air-entraining admixture 0.03%, the results are similar. Therefore, the concrete matrix where 30% of fine aggregate weight was replaced by stone dust sludge, and where fly ash, superplasticizer, and air-entraining admixtures were used, can be designed similarly to the ordinary concrete. Due to waste recycle, it should be necessary to be maintaining the nature conservation and its creative value. key word : stone dust sludge, fluidity, age of strength, replacement rate
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