n Ergonomics SA : Journal of the Ergonomics Society of South Africa - A case study of the effect of a low-cost design concrete mixer on reducing human effort : research article
|Article Title||A case study of the effect of a low-cost design concrete mixer on reducing human effort : research article|
|© Publisher:||Ergonomics Society of South Africa|
|Journal||Ergonomics SA : Journal of the Ergonomics Society of South Africa|
|Author||J. De Beer|
|Publication Date||Dec 2006|
|Pages||50 - 55|
|Keyword(s)||Concrete mixer, Hand mixing, Manually propelled, Mixing time and Physical effort|
A manually operated concrete mixing device (Roll-a-mix) was developed to address the production problems inherent in mixing concrete by hand. The method to determine the mixing time of concrete by measuring the rate of change in the uniformity of the mixed concrete was used to compare the productivity of the Roll-a-mix to the hand mixing of concrete It is reported that 31.4 % less human energy was spent operating Roll-a-mix, than producing similar acceptable quality concrete by conventional hand mixing. Suggestions are given for further research.
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