Abstract
The article deals with the issues of reliability of quality control of building materials and products. The structural diagram of the reliability of control of building materials is presented as a combination of series-connected technological operations. The purpose of the work is to assess the regulatory security of quality control of the production of building materials and products. The block diagram of quality control of concrete blocks for basement walls is presented. On the example of concrete blocks for basement walls, an assessment of the normative provision of product quality indicators is given. It has been established that the quality assurance of concrete blocks for FBS basement walls if all production parameters and quality indicators meet the requirements of regulatory documents and the condition: the mathematical expectation is in the middle of the product tolerance field and ± 3σ in the tolerance field is 0.9576, and the probability the appearance of marriage - 4.238%. The influence of the spread of indicators on the quality assurance is considered. It is found that with an increase in the value of the standard deviation to a value that is within the tolerance range of ± 2.5σ, the quality assurance decreases and amounts to 0,8092, and the probability of the appearance of defects is 19.08 %. It is shown that the application of the Six Sigma methodology at the enterprise will contribute to improving the quality of products
Highlights
The structural diagram of the reliability of control of building materials is presented as a combination of series-connected technological operations
It has been established that the quality assurance of concrete blocks for FBS basement walls if all production parameters and quality indicators meet the requirements of regulatory documents and the condition: the mathematical expectation is in the middle of the product tolerance field and ± 3σ in the tolerance field is 0.9576, and the probability the appearance of marriage - 4.238%
It is found that with an increase in the value of the standard deviation to a value that is within the tolerance range of ± 2.5σ, the quality assurance decreases and amounts to 0,8092, and the probability of the appearance of defects is 19.08 %
Summary
Представлена структурная схема контроля качества бетонных блоков для стен подвалов. Установлено, что обеспеченность качества блоков бетонных для стен подвалов ФБС, если все параметры производства и показатели качества соответствуют требованиям нормативных документов и условию: математическое ожидание находится в середине поля допуска на продукцию и в поле допуска находятся ± 3σ составляет 0,9576, а вероятность появления брака – 4,238 %. Что при возрастании значения среднеквадратического отклонения до значения, что в поле допуска находятся ± 2,5σ, обеспеченность качества уменьшается и составляет 0,8092, а вероятность появления брака – 19,08 %. В табл. приведены значения надежности контроля качества продукции при различном соотношении среднеквадратичного отклонения в поле допуска. Установлено, что надежность контроля качества блоков ФБС, если все параметры производства и показатели качества соответствуют условию: математическое ожидание находится в середине поля допуска m на продукцию и в поле допуска находятся. Таблица 1 Надежность контроля показателей качества блоков при различных состояниях производства
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