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Theconcreteproportionsandtestresultof28-daycompressivestrengthareshowninTable2.Basedo...
The concrete proportions and test result of 28-day compressive strength are shown in Table 2. Based on the proportions in Table 2, the specimens were cast 100mm*100mm*300mm. Two pieces of latten sized in 90mm*90mm as electrodes were vertically set in one specimen face to face between around 20cm. In calculations the accuracy of distance was 0.1cm. After placing for one day, leave from molds and cure naturally. The resistivity was calculated following the equation ρ=PA/L, where ρ is the resistivity in kΩ.cm, R the electrical resistance in kΩ, A the latten area in cm2, and L the distance between electrodes in cm.
In influence of iron oxide content fly ash on concrete systematie resistivity
The fly ash is one widely used concrete admixture, whose chemical composition is different for its raw materials, producing areas and producing procedure. Then the iron oxide content of fly ash is different. And it is hnown that the iron oxide has some electrical conductivity. The iron oxide content of some fly ash can be up to above 15%. Therefore it is valuable to study on how and how much the iron oxide in fly ash contributes to the concrete systematic resistivity.
In Fig.1, it is demonstrated that when w/b was 0.25, with the same fly ash dosage the concrete resistivity almost went down as the iron oxide content increased. When w/b was 0.35 and 0.675, the same trend was found. It was proved that the iron oxide in fly ash can improves the concrete electrical conductivity to a degree. The more iron oxide the fly ash contained, the lower the systematic resistivity was. The main reason is that the increase of iron oxide make it much more possible that through the contact of single iron oxide, even the join with each other, the conducting network is built up to improve the solid conductivity. Consequently, the amount of iron oxide in fly ash has objective effect on the concrete systematic resistivity.
Influence of fly ash dosage on concrete systematic resistivity
When binder dosage was 600 kg/m3 and 250 kg/m3, respectively, the relations between concrete resistivity and fly ash dosage were observed, Fig.2. 展开
In influence of iron oxide content fly ash on concrete systematie resistivity
The fly ash is one widely used concrete admixture, whose chemical composition is different for its raw materials, producing areas and producing procedure. Then the iron oxide content of fly ash is different. And it is hnown that the iron oxide has some electrical conductivity. The iron oxide content of some fly ash can be up to above 15%. Therefore it is valuable to study on how and how much the iron oxide in fly ash contributes to the concrete systematic resistivity.
In Fig.1, it is demonstrated that when w/b was 0.25, with the same fly ash dosage the concrete resistivity almost went down as the iron oxide content increased. When w/b was 0.35 and 0.675, the same trend was found. It was proved that the iron oxide in fly ash can improves the concrete electrical conductivity to a degree. The more iron oxide the fly ash contained, the lower the systematic resistivity was. The main reason is that the increase of iron oxide make it much more possible that through the contact of single iron oxide, even the join with each other, the conducting network is built up to improve the solid conductivity. Consequently, the amount of iron oxide in fly ash has objective effect on the concrete systematic resistivity.
Influence of fly ash dosage on concrete systematic resistivity
When binder dosage was 600 kg/m3 and 250 kg/m3, respectively, the relations between concrete resistivity and fly ash dosage were observed, Fig.2. 展开
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具体比例和试验结果在28天内抗压强度见表2。根据表2的比例,这些标本中,共投100毫米* 100毫米* 300毫米。两件黄铜薄片规模的90毫米* 90毫米的电极垂直设置在一个标本面对面之间20厘米左右。在计算距离的准确性0.1厘米。一天后,放入模具和休假,自然治愈。电阻率的计算公式后,ρ=尼龙/ L,其中ρ是在kΩ.cm电阻率,研究在kΩ的电阻,一个平方厘米的黄铜薄片地区,和L电极之间厘米的距离。
铁氧化物含量ñ影响粉煤灰混凝土灰系统化的电阻率.
粉煤灰广泛应用于混凝土外加剂,其化学成分之一,是不同的原材料,生产领域和生产程序。然后粉煤灰氧化铁含量是不同的。它是hnown的氧化铁有一定的导电性。一些粉煤灰氧化铁含量可达到15%以上。
因此,这是值得探讨如何和多少,粉煤灰氧化铁有助于具体系统的电阻率。
在图1,这是表明,当瓦特/ B是0.25相同剂量的粉煤灰混凝土电阻率几乎到的氧化铁含量下降,增加了。当瓦特/ B是0.35和0.675,同样的趋势被发现。这证明,在氧化铁粉煤灰可以改善混凝土的导电性在一定程度上。越氧化铁中的粉煤灰,
低电阻率的系统。主要的原因是铁的氧化物的增加使得它更可能是通过单一的氧化铁接触,甚至互相连接,进行网络的建成,改善了坚实的导电性。因此,飞灰量氧化铁已在混凝土系统电阻率的客观效果。
粉煤灰对混凝土电阻率的灰剂量系统.
当粘结剂用量为600 kg/m3的和250 kg/m3的分别,混凝土电阻率之间的关系和粉煤灰灰剂量观察,图2。
铁氧化物含量ñ影响粉煤灰混凝土灰系统化的电阻率.
粉煤灰广泛应用于混凝土外加剂,其化学成分之一,是不同的原材料,生产领域和生产程序。然后粉煤灰氧化铁含量是不同的。它是hnown的氧化铁有一定的导电性。一些粉煤灰氧化铁含量可达到15%以上。
因此,这是值得探讨如何和多少,粉煤灰氧化铁有助于具体系统的电阻率。
在图1,这是表明,当瓦特/ B是0.25相同剂量的粉煤灰混凝土电阻率几乎到的氧化铁含量下降,增加了。当瓦特/ B是0.35和0.675,同样的趋势被发现。这证明,在氧化铁粉煤灰可以改善混凝土的导电性在一定程度上。越氧化铁中的粉煤灰,
低电阻率的系统。主要的原因是铁的氧化物的增加使得它更可能是通过单一的氧化铁接触,甚至互相连接,进行网络的建成,改善了坚实的导电性。因此,飞灰量氧化铁已在混凝土系统电阻率的客观效果。
粉煤灰对混凝土电阻率的灰剂量系统.
当粘结剂用量为600 kg/m3的和250 kg/m3的分别,混凝土电阻率之间的关系和粉煤灰灰剂量观察,图2。
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