This research study is the ratio of production concrete block shell aims to study the appropriate ratio of the concrete block production of a mixture of Rice Straw and chaff ash cement and sand (as one of the ingredientsThe size is 20 X 100 X 20 mm 7 times a day to educate and bring a sample test to find the physical features found that every aspect ratio is the ratio of the absorbed water module Honduras breaks through the criteria.58 and the value changes, the length can not pass through standard criteria
การแปล กรุณารอสักครู่..