2008530 ensp 0183 enspFerronickel slag fine aggregate concrete with appropriate air content offer quality almost equivalent to that of conventional concretes When the FNS mixture ratio exceeds50 it is very important to minimize the watercement ratio of concrete The unit water content needs to be reduced using airentraining AE and waterreducing
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However, air-entrained alkali-activated slag concrete suffered more damage than Portland cement concrete during the freeze-thaw tests. Pu et al. (1988) (cited by Wang et al., 1995) studied the frost resistance of AAS concretes having different strengths (low, medium and high) according to a Chinese standard in which the freezing took place in air. They found that no
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air content increases with an increasing fly as h content, and increasing fineness and loss on ignition value of a fly ash. It also marginally increases in some cases with increasing slag
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The effects of chemical admixtures in concrete containing slag cement are similar to their effects in ordinary portland cement concrete. Trial batches will determine proper admixture dosages. Slag cement does not contain carbon and therefore should not cause fluctuations in air content. Slag cement is also compatible with pozzolans such as fly ash or silica fume. The percentage
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Low curing temperatures can result in greater retardation of the setting time, but the use of chemical accelerators can aid to minimize the delay, if necessary. To achieve a given entrained-air content, the amount of air entrainment needed for concrete containing slag cement is similar to that of Portland cement concrete (ACI-Committee-233, 2017).
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Air content of concrete with GBS slag was similar to that of standard concrete ... • Improved (lower weight loss compared to the standard concrete). Air Content • Increased as the aggregate-slag substitution percentage increased (with replacement percentages higher than 15%, the air content was about 2%). This was due to a greater addition of additive to achieve
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Slag cement does not contain carbon and does not cause instability in the entrained air content. Time of Set. Time of initial set is influenced by the use of slag cement and fly ash. Concrete made with slag cement can have faster set times than concrete made with fly ash (Figure 2). Pumpability and Finishability. Pumpability with slag cement and fly ash is generally improved
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Air Content in Concrete Mix Design. The primary purpose of entraining air in concrete is to increase its durability when exposed to freeze/thaw cycles with water present. Air-entraining admixtures for concrete create small, uniform, and stable air bubbles from around 0.01mm to 1mm diameter in the cement matrix throughout a concrete mix. The bubbles become air voids
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The incorporation of air-quenching steel slag of 0.315–5 mm (in which the content of Fe 1-σ O is over 30%) into concrete to fabricate mechanically sensitive concrete was investigated by Li et al. in 2005 [21]; subsequently, Jia performed a systematic study of
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346-3 Classification, Strength, Slump and Air Content. 346-3.1 General: The separate classifications of concrete covered by this Section are designated as Class I, Class II, Class III, Class IV, Class V and Class VI. Strength and slump are specified in Table 2. The air content range for all classes of concrete is 1.0 to 6.0%, except for
MoreHowever, air-entrained alkali-activated slag concrete suffered more damage than Portland cement concrete during the freeze-thaw tests. Pu et al. (1988) (cited by Wang et al., 1995) studied the frost resistance of AAS concretes having different strengths (low, medium and high) according to a Chinese standard in which the freezing took place in air. They found that no
MoreThe effects of chemical admixtures in concrete containing slag cement are similar to their effects in ordinary portland cement concrete. Trial batches will determine proper admixture dosages. Slag cement does not contain carbon and therefore should not cause fluctuations in air content. Slag cement is also compatible with pozzolans such as fly ash or silica fume. The percentage
Moreair content increases with an increasing fly as h content, and increasing fineness and loss on ignition value of a fly ash. It also marginally increases in some cases with increasing slag
MoreAir Content in Concrete Mix Design. The primary purpose of entraining air in concrete is to increase its durability when exposed to freeze/thaw cycles with water present. Air-entraining admixtures for concrete create small, uniform, and stable air bubbles from around 0.01mm to 1mm diameter in the cement matrix throughout a concrete mix. The bubbles become air voids
MoreAir content of concrete with GBS slag was similar to that of standard concrete ... • Improved (lower weight loss compared to the standard concrete). Air Content • Increased as the aggregate-slag substitution percentage increased (with replacement percentages higher than 15%, the air content was about 2%). This was due to a greater addition of additive to achieve
MoreSlag cement does not contain carbon and does not cause instability in the entrained air content. Time of Set. Time of initial set is influenced by the use of slag cement and fly ash. Concrete made with slag cement can have faster set times than concrete made with fly ash (Figure 2). Pumpability and Finishability. Pumpability with slag cement and fly ash is generally improved
MoreThe incorporation of air-quenching steel slag of 0.315–5 mm (in which the content of Fe 1-σ O is over 30%) into concrete to fabricate mechanically sensitive concrete was investigated by Li et al. in 2005 [21]; subsequently, Jia performed a systematic study of
More
18.06.2021 Furthermore, the slump and air content of concrete made with the aggregates met the target values. The slump decreased and the air content increased with increasing amounts of air-cooled slag aggregate. Mechanical testing of the concretes containing air-cooled slag aggregate established that they met the performance requirements for rural road pavement.
More346-3 Classification, Strength, Slump and Air Content. 346-3.1 General: The separate classifications of concrete covered by this Section are designated as Class I, Class II, Class III, Class IV, Class V and Class VI. Strength and slump are specified in Table 2. The air content range for all classes of concrete is 1.0 to 6.0%, except for
More
15.03.2014 Results show that the use of RCA or SSA has an adverse effect on the workability and air content of fresh concrete. While RCA resulted in reduction in the mechanical properties of concrete, SSA enhanced these properties. In order to enhance the properties of RAC so that it can be used safely in structural concrete, the RCA has been partially replaced by SSA in
MoreHowever, air-entrained alkali-activated slag concrete suffered more damage than Portland cement concrete during the freeze-thaw tests. Pu et al. (1988) (cited by Wang et al., 1995) studied the frost resistance of AAS concretes having different strengths (low, medium and high) according to a Chinese standard in which the freezing took place in air. They found that no
MoreThe effects of chemical admixtures in concrete containing slag cement are similar to their effects in ordinary portland cement concrete. Trial batches will determine proper admixture dosages. Slag cement does not contain carbon and therefore should not cause fluctuations in air content. Slag cement is also compatible with pozzolans such as fly ash or silica fume. The percentage
Moreair content increases with an increasing fly as h content, and increasing fineness and loss on ignition value of a fly ash. It also marginally increases in some cases with increasing slag
MoreAir Content in Concrete Mix Design. The primary purpose of entraining air in concrete is to increase its durability when exposed to freeze/thaw cycles with water present. Air-entraining admixtures for concrete create small, uniform, and stable air bubbles from around 0.01mm to 1mm diameter in the cement matrix throughout a concrete mix. The bubbles become air voids
MoreAir content of concrete with GBS slag was similar to that of standard concrete ... • Improved (lower weight loss compared to the standard concrete). Air Content • Increased as the aggregate-slag substitution percentage increased (with replacement percentages higher than 15%, the air content was about 2%). This was due to a greater addition of additive to achieve
MoreSlag cement does not contain carbon and does not cause instability in the entrained air content. Time of Set. Time of initial set is influenced by the use of slag cement and fly ash. Concrete made with slag cement can have faster set times than concrete made with fly ash (Figure 2). Pumpability and Finishability. Pumpability with slag cement and fly ash is generally improved
MoreThe incorporation of air-quenching steel slag of 0.315–5 mm (in which the content of Fe 1-σ O is over 30%) into concrete to fabricate mechanically sensitive concrete was investigated by Li et al. in 2005 [21]; subsequently, Jia performed a systematic study of
More18.06.2021 Furthermore, the slump and air content of concrete made with the aggregates met the target values. The slump decreased and the air content increased with increasing amounts of air-cooled slag aggregate. Mechanical testing of the concretes containing air-cooled slag aggregate established that they met the performance requirements for rural road pavement.
More346-3 Classification, Strength, Slump and Air Content. 346-3.1 General: The separate classifications of concrete covered by this Section are designated as Class I, Class II, Class III, Class IV, Class V and Class VI. Strength and slump are specified in Table 2. The air content range for all classes of concrete is 1.0 to 6.0%, except for
More15.03.2014 Results show that the use of RCA or SSA has an adverse effect on the workability and air content of fresh concrete. While RCA resulted in reduction in the mechanical properties of concrete, SSA enhanced these properties. In order to enhance the properties of RAC so that it can be used safely in structural concrete, the RCA has been partially replaced by SSA in
More