EN 1467-2012 pdf download.Natural stone-Rough blocks – Requirements.
3.3
gross size of the rough block
size defined by the lengths of the edges of the smallest parallelepiped circumscribed to a rough block (see Figure 1)
3.4
net size of a rough block
size which is determined In the following manner: Establish the greatest inscribed parallelepiped block which shall not contain any sides without right angles nor contain drill holes and other holes. The resulting figure is the net size
3.5
rough block
basis of the usable stone consisting of rocks obtained directly from quarries or erratics with no processing whatsoever except extraction and shaping by cutting or splitting
3.6
rough block of specific size
squared rough block with certain given dimensions
3.7
shapeless rough block
rough block without regular shape and size
3.8
squared rough block
rough block which corresponds approximately to a regular parallelepiped
Note 1 to entry: Normally the ratio obtainable by dividing the mass of the squared rough block by the apparent density should be bigger than 80 % of the gross size. If such a ratio is equal to or less than 80 %. the block is considered a shapeless rough block.
4 RequIrements
4.1 Requirements for geometric characteristics
4.1.1 Measurement criteria
Ail measurements shall be carried out in accordance with EN 13373 and indicated in metres to two decimals places
4.1.2 Requirements on shape
The six sides of squared rough block shall be approximately flat, right-angled and parallel, and correspond to the shape of a parallelepiped. Local deviations from the parallelepiped shape are permitted. Shapeless rough blocks for commercial purposes are only measured by mass. (see 4.1.4); gross size shall be provided upon request.
Rough blocks of specific size shall have dimensions not lower than the minimum values and not greater than the maximum values agreed between the purchaser and supplier.
4.1.3 RequIrements for volume
The volume of a rough block shall be stated in cubic metres to three decimals pLaces. The volume may be
calculated by dividing the mass of the block by the apparent density.
4.1.4 Requirements for mass
The mass of a rough block shall be stated in tonnes with three decimals. The mass shall be obtained by weighing: for squared blocks the approximate mass may be obtained by multiplying the volume by the apparent density.
4.2 RequIrements of natural stone for rough blocks
4.2.1 General
The following characteristics shall be declared where requested by this European Standard, or with reference to use conditions.
The declared values shall be representative of the current production. However, due to natural variations of the stone materials, deviations from the declared values may occur. Expected deviations shall be indicated by the manufacturer
In case of layered stone: If a rough block contains different types of stones (see 4.2.2) all characteristics shall be declared.
4.2.2 Denomination
The denomination (traditional name, petrological family, typical colour and place of origin) shall always be declared in accordance with EN 12440.
NOTE The place of origin can be given by GPS coordinates.
This characteristic shall always be declared.
The flexural strength shall be determined using the test method in EN 12372 or EN 13161. and the mean
value, lower expected value and standard deviation shall be declared.
4.2.6 Other requirements
Where required, for example when the denved product is to be used for a specific purpose, additional tests may be requested in accordance with relevant product standard (see EN 1469 [1], EN 12057 [2), EN 12058 [3j, etc.).
5 Marking
As a minimum of identification, each consignment shall carry the following indications:
the denomination of the natural stone, in accordance with EN 12440;
— the mass and the volume of each block;
– the dimensions (including at least gross and commercial sizes) of each block. The direction of the natural layer of each block shall be clearly marked where appropriate. Each block shall be clearly identified by a recorded identification system.
6 Evaluation of conformity and factory production control
6.1 Evaluation of conformity
The compliance with the requirements of this European Standard and with the stated values or classes of reaction to fire shall be demonstrated by carrying out initial type testing. Additionally, the manufacturer shall exercise a permanent factory production control (FPC) and keep record of the results for at least 2 years.
The declared values shall be representative of the current production, for example the lowest expected value or the minimum test value in normal production.
For sampling see Annex A.
When the rough blocks manufacturer declares conformity with some characteristics included In a product standard (see EN 1469 [1J. EN 12057 [2], EN 12058 [3), etc.). the evaluation of conformity of the block shall include initial type testing and factory production control as described in the appropriate product standard.EN 1467-2012 pdf download.
EN 1467-2012 pdf download
PS:Thank you for your support!
