什么是混凝土的体积批量以及如何在现场进行？

What Is Volume Batching of Concrete?

批量混凝土装置在混合之前测量混凝土（即水泥，砂，粗骨料和水）的不同成分。当该测量基于体积完成时，我们称之为Volume Batching. Below are mentioned some of important points to remember before adopting volume batching method in field.

• 体积配料并不是一个好方法for measuring concrete materials.
• It is not applicable in case of reinforced concrete structure.
• This method of concrete batching may not be economical.
• It can be only used for unimportant concrete or for small concrete works.

批量批量如何在现场完成？

在批量批量混凝土成分之前，我们需要了解两件事。

1. 在体积方面的混凝土成分的相对比例是多少？
2. 什么是水水柱比？

After knowing these two things you can proceed to batch concrete ingredients in field.

The table shown below can be used as a reference to find out relative proportion of different ingredients, for different grades of concrete.

Grade of Concrete	Relative Proportion of Ingredients by Volume			In General We Specify It As
	Cement	Fine Aggregate	Coarse Aggregate
M 10	1	3	6	1:3:6
M 15	1	2	4	1:2:4
M 20	1	1.5	3	1：1.5：3
M 25	1	1	2	1:1:2

使用的水柱比必须根据合同。

Step-1-Batching of cement

水泥总是按重量计衡量。主要是它在袋子方面使用。一袋水泥重50千克，体积为35升（或0.035米³). Cement should not be batched by volume because its weight per unit volume varies according to the way the container is filled.

Step-2-Batching of aggregate (by volume)

使用规格盒（如图所示），用于批量批量致粗块。盒子不应该太浅。它应该完全充满聚集体。材料的顶部应用直边撞击水平。新利客户混凝土材料的比例决定了盒子新利客户的容量。通常压力箱的容量等于一袋水泥的体积（即35升）。方便的规模框，以适应不同的比例，如下表所示。

升的能力	Inside Dimensions of gauge box in cm
	Length	Breadth	Depth
25	25	25	40
30	25	25	48
35	27	27	48
40	29	29	48
45	30	30	50
50	31	31	52

Note:The moisture present in aggregates andbulking of sandmust be accounted for while volume batching is adopted.

The following table gives the approximate surface moisture carried by aggregates as per IS-456-2000.

Condition of Aggregates	近似的表面定位量
	Percent by Mass	Litre per m3
Very wet sand	7.5	120
Moderately wet sand	5.0	80
Moist sand	2.5	40
Moist gravel or crushed rock	1.25-2.5	20-40

Step-3-Batching of water

Water is measured either in kg or litres as may be convenient. In this case, the two units are same, as the density of water is one kg per litre. The quantity of water required is calculated by multiplying water-cement ratio with weight of cement.

Also Read:Worked Out Example on Volume Batching of Concrete

Also Read:How to Mix Concrete Manually On Site?