Limestone construction, stone limy

it has to be produced according to requirements of the present standard for the production schedules approved in the order established by the ministry manufacturer.

2.2. The materials applied by production of construction lime: breeds are carbonate, mineral additives (slags the granulated domain or electrothermophosphoric, active mineral additives, quartz sand), have to meet requirements of the relevant existing normative documents.

2.2.1. Mineral additives are entered into powdery construction lime in the quantities allowed by requirements to content in it active CaO + MGO according to item 2.4.

2.3. Air not extinguished lime without additives is subdivided into three grades 1, 2 and 3, not extinguished powdery with additives - into two grades 1 and 2 and hydrate (extinguished) without additives and with additives - into two grades 1 and 2

2.4. Air lime has to conform to the requirements specified in tab. 1.

Name of an indicator	Norm for lime, %, on weight
	Not extinguished calcic			hydrate
	grade			grade
	1	2	3	1	2
Active SAO + MGO, not less: without additives with additives	90 65	80 55	70 -	67 50	60 40
Active MgO, no more	5	5	5	-	-
CO2, no more: without additives with additives	3 4	5 6	7 -	3 2	5 4
Nepogasivshiyesya grains, no more	7	11	14	-	-

Notes:
1. In brackets the maintenance of MGO for dolomitic lime is specified.
2. CO2 in lime with additives determine by a gas-volume method.

2.4.1. Humidity of hydrate lime should not be more than 5%.
2.4.2. If on separate indicators lime corresponds to different grades, then the rating is determined by the size of the indicator corresponding to the lowest grade.
2.5. Air lime without additives to which the state Quality mark is in accordance with the established procedure appropriated has to meet the requirements of 1 grade with the following changes:
the coefficient of a variation of maintenance of active CAO and MGO should not be more than 3%;
content of not extinguished grains for calcic lime should not be more than 5%, for magnesian and dolomitic - more than 8%;
the maintenance of active SAO and MGO for hydrate lime has to be not less than 70%, humidity - no more than 4%.