Нижний Новгород Весовое оборудование

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ООО Скалес - Промышленные весы, автомобильные весы

ПРОМЫШЛЕННЫЕ ВЕСЫ И СИСТЕМЫ
АВТОМАТИЧЕСКОГО ВЗВЕШИВАНИЯ И ДОЗИРОВАНИЯ

ТЕХНИЧЕСКИЕ

НОВИНКИ

Acceptance criteria of concrete

1. Compressive Strength

The concrete shall be deemed to comply with the strength requirements when both the following condition are met:

a) The mean strength determined from any group of four consecutive test results compiles with the appropriate limits in col 2 of Table 11.

b) Any individual test result complies with the appropriate limits in col 3 of Table 11 in IS-456:2000.

2. Flexural Strength

When both the following conditions are met" the concrete complies with the specified flexural strength.

a) The mean strength determined from any group of four consecutive test results exceeds the specified characteristic strength by at least 0.3 N/sqmm

b) The strength determined from any test result is not less than the specified characteristic strength less 0.3 N/sqmm.

Compressive Strength checking

3. Quantity of Concrete Represented by Strength Teat Results The quantity of concrete represented by a group of four consecutive test results shall include the batches from which .the first and last samples were taken together with all intervening batches. For the individual test result requirements given in col 2 of Table 11 or in item (b) of 16.2, only the particular batch from which the sample was taken shall be at risk. Where the mean rate of sampling is not specified the maximum quantity of concrete that four consecutive test results represent shall be limited to 60 cum.

4. If the concrete is deemed not to comply persuant to 16.3. the structural adequacy of the parts affected shall be investigated (see 17) and any consequential action as needed shall be taken.

5. Concrete of each grade shall be assessed separately.

6. Concrete is liable to be rejected if it is porous or honey-combed. its placing has been interrupted without providing a proper construction joint. the reinforcement has been displaced beyond the tolerances specified. or construction tolerances have not been met. However. the hardened concrete may be accepted after carrying out suitable remedial measures to the satisfaction of the engineer in-charge.

Read also: Self-healing concrete as one of the construction trends in 2022.

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