The first: raw materials storage requirement:

1). sand of fine aggregate moisture content after drying treatment should be less than 0.5%, other fine aggregate moisture content should be less than 1.0%.

2). sand should be take the sizing screen according to the different particle sizes, and separately stored in different special silos and ensure the uniform particles.

3). all raw materials should be stored in a special silos and mark clearly.

The second: measurement accuracy should be:

1). the measurement should take quality standard measurement, the measurement error should be in accordance with national deviation measurement.

2). measuring equipment shall be legally effective certificate issued by the measuring department.

3). measuring equipment must satisfy the production of different varieties of dry powder mortar.

Third: uniform mix:

1). the production line should be controlled by computer program.

2). mortar powder material must adopt forced mechanical mixing, to ensure uniform mixing of various components.

3). mixer and conveying equipment should be cleaned up when change the production for different mortar.

Fourth: requirement in packaging, finished storage and  transportation should be paid attention to:

1). dry mortar can be divided into and bulk bags, bags of powder material each bag packaging quality shall not be less than 98% of logo quality.

2). dry mortar packing paper bags should comply with the relevant provisions. Ordinary mortar powder bags should be marked on the product name, symbol, the strength grade, the production factory name, address, net content, water content scope and shelf life, packaging year, month, day, and number and cie standard number; Special packages should be marked on the product name, production of dry mortar factory name and address, net content, water content scope, shelf life, packaging year, month, day, and code and standards. If the use of instruction in small packing should be 6.

3). bulk dry mortar used canned car will dry mortar transportation to the construction site, and to sign the same bags contents of the card.

4). quality guaranteed period of bags of dry mortar at 3 months. Bulk dry mortar products must be stored in the special sealed silos, which has rainproof treatment, the quality guaranteed period less than 3 months. Different varieties or strength grade mortars should be stored separately, not allowed mixed.

5). To avoid damp in dry mortar storage and transportation.