The particle size analysis allows to identify the granulometric range of the particles that compose a given material. The determination of the particle size or grain size assortment, occurs through the sieving of a known sample of material. Sieving is performed manually or in an automated manner through an electromagnetic sieving. The tested sample is through a series of sieves (screens). The sieves are constituted by a square mesh and they are arranged with decreasing mesh downward. The range of particle size is determined by correlating the percentage of restrained compared to the passer referred to the whole sample analyzed. Sieves must conform to UNI EN 933-2, ISO 3310.
The range of particle size appears to be crucial for workability of material and proper installation, as well as some mechanical properties.

Sampling

The sampling must take place according to the standard uni 1015-2. The sampling should take place as a result of quartering. The mass to be considered for proper particle size analysis is so determined:
0.3 kg for Dmax = <4 mm;
0.6 kg for Dmax> 4 mm
Subsequently, the wet sample should be placed in ventilated ovens at temperatures of about 105°C. The sample is considered dry when the difference between two successive weighings is less than a gram.

Equipment necessary to perform the test:

  • scale with capacity of at least 1 kg;
  • sieves comply with ISO standard 3310-1;
  • sieve for fine particles and its cover;
  • metal tray of size at least 200 mm to 50 mm height;
  • ventilated oven at controlled temperatures maintained at a temperature between (105 +/- 5)°C and (60 +/- 5) ° C;
  • automatic shaker for sieves.

 

Material type Standard Test method
finishing plasters EN 998-1
  •  
gypsum-based plasters EN 13279-1 EN 13279-2
skim coats EN 998-1
  •  
screeds EN 13813
  •  
self-levelings EN 13813
  •  
restoring EN 1504-3 EN 12192-1
adhesives EN 12004
  •  
grouting mortars EN 13888
  •  
waterproofing EN 14891
  •  
surface protection mortars EN 1504-2 EN 12192-1

 

Instruments used to perform the test: Electro-magnetic sieve shaker, sieves, ultrasonic washings.

 

The particle size analysis allows to identify the granulometric range of the particles that compose a given material.The particle size analysis allows to identify the granulometric range of the particles that compose a given material.The particle size analysis allows to identify the granulometric range of the particles that compose a given material.

The particle size analysis allows to identify the granulometric range of the particles that compose a given material.The particle size analysis allows to identify the granulometric range of the particles that compose a given material.

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