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CA-3S direct reading gas content, gas content

total supply
999 台
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1 台
brand
沧州畅丰试验仪器有限公司
area
HebeiCangzhou City
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Product Details
 混凝土直读式含气量使用方法:

一、加压方式与调整

仪器加压采用手动加压,同时气室压力应大于0.1MPa,然后仔细旋动调整阀使气室压达到0.1MPa即可进行下一步试验。

二、具体试验步骤如下

(1)量钵容积的标定

先称量含气量测定仪量钵加玻璃板总重,然后量钵加满水,用玻璃板沿量钵顶面平推,使量钵内盛满水而且玻璃板下无气泡,擦干钵体外表面后连同玻璃板一起称重,两次质量的差值除以该温度下水的密度即为量钵的容积V。

(2)含气量0%点的标定

把量钵加满水,将校正管2接在钵盖下面小龙头底部孔内,将钵盖轻放在量钵上,用夹子夹紧使其气密良好,并用水平仪检查仪器的水平,打开小龙头,松开排气阀,用注水器从小龙头处加水,直至排气阀出水口冒水为止,然后拧紧小龙头和排气阀。此时钵盖和钵体之间的空隙被水充满。

用手泵向气室充气,使表压稍大于0.1MPa,然后用微调阀调整表压使其为0.1MPa,按下阀门杆1—2次,使气室的压力气体进入量钵内,读压力表读数,此时指针所示压力相当于含气量0%。

混凝土直读式含气量(3)含气量1%—10%的标定

含气量0%标定后,将校正管1接在钵盖小龙头的上端,然后按一下阀门杆,慢慢打开小龙头,量钵中的水就通过校正管1流到量筒中,当量筒中的水为钵体容积的1%时关闭小龙头。

打开排气阀,使量钵内的压力与大气压平衡,然后重新用手泵加压,并用微调阀准确地调到0.1MPa,按1—2次阀门杆,此时测得的压力表读值相当于含气量1%,同样方法可测得含气量,2%,3%—10%的压力表读值。

以压力表读值为横坐标,含气量为纵坐标,绘制含气量与压力表读值关系曲线。

三、混凝土拌和物含气量的测定

(1)擦净量钵与钵盖内表面,并使其水平放置,将新拌混凝土拌和物均匀适量地装入量钵内用振动台振实,振动时间15一30s为宜,也可用人工捣实,将拌和物分三层装料,每层插捣25次,插捣上层时捣棒应插入下层10—20mm。

(2)刮去表面多余的混凝土拌和物,用镘刀抹平,并使其表面光滑无气泡。

(3)擦净钵体和钵盖边缘,将密封圈放于钵体边缘的凹槽内,盖上体盖,用夹子夹紧,使之气密良好。

(4)打开小龙头和排气阀,用注水器从小龙头处往量钵中注水,直至水从排气阀口流出,再关紧小龙头和排气阀。

(5)关好所有的阀门,用手泵打气加压,使表压稍大于0.1MPa,用微调阀准确地将表力压调到0.1MPa。

(6)按下阀门杆1一2次,待表压指针稳定后,测得压力表读数P01。

(7)开启排气阀压力仪表应归零,对容器中试样再测定一次压力值P02

(8)如果P01和P02的相对误差小于0.2%,以两次测值的算术平均值,按压力与含气量关系曲线查得所测混凝土样品的仪器测定含气量A1值(精确至0.1%)作为试验结果,如果不满足,则应进行第三次试验,测得压力值P03当P03与P01、P02中较接近一个值的相对误差不大于0.2%时,则取两值的算术平均值,按压力与含气量关系曲线查得所测混凝土样品的仪器测定含气量A1值(精确至0.1%)作为试验结果。当仍大于0.2%时,须重作试验。

混凝土直读式含气量

 

直读含气量测定仪特点

混合式气压法含气量测定仪,符合中华人民共和国交通部,2005-08-01发布的《公路工程水泥及水泥混凝土试验规程》,(JTGE30-2005)中混凝土拌和物含气量试验,(T0526-2005)的全部规定,本仪器同量钵和量钵盖采用优质不锈铝材料制造,防腐蚀,外形美观,装拆方便。

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