The common quality problems of the concrete construction: the concrete strength is unusually high or low.

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Causes:

1. The concrete raw materials do not conform to the requirements Mobile [url=http://www.daswellmachinery.com/product/Concrete%20_Mixer/20130929/25.html]portable concrete mixer[/url]s, for example: the cement is overdue and is affected with damp, the silt content of sand is too big , the sacked cement has a shortage in weight and so on. All these factors could cause the concrete strength is unusually high or low.

2. The mix proportion of concrete mix is not correct, or the measure of the raw material is not accurate Mobile Concrete Brick Making Machine, such as the sand and stone are not weighed, the water is not inaccurately added, or the mixing time of the concrete mixer is not enough.

3. The concrete briquette is not produced or maintained by the regulation small concrete mixer, the try mold is transmutative or poorly managed, or the curing condition does not conform to the requirements.

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Precautionary measures:

1. The concrete raw materials should be qualified products, and we should strictly control the mixture proportion, guarantee the accuracy of the measurement and add the admixtures according to the regulations.

2. The concrete should be mixed homogeneously, the admixtures solution amount should be homogeneously added to the water. And the mixing time should be reasonably determined according to the concrete slump and the capacity of the concrete mixer.