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| Q. |
Which of the following statement is wrong? |
| A. | The coarse sand produces a harsh and unworkable mix. |
| B. | An admixture cannot increase the workability of concrete without increasing water content. |
| C. | Salts of manganese cause a considerable reduction in the strength of concrete. |
| D. | all of the above |
| Answer» B. An admixture cannot increase the workability of concrete without increasing water content. | |
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