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Optilyte Insulation Units

 

Description

Produced in solid form, Optilyte units are extremely light, grey in colour and give an open textured finish. The face of the Optilyte unit provides an ideal key for plastering.

 

Composition

Optilyte ultra lightweight units are manufactured from expanded clay lightweight aggregate and cement. Optilyte units are manufactured from a special kind of clay which through heat expansion is transformed into lightweight porous granules with numerous cavities, giving Optilyte its incredible lightweight properties.

 

Standards

Optilyte units comply with BS EN 771-3 and associated test standards.

 

Format and Size

Available in Solid format.
Face work size is 440mm x 215mm.
Tolerances as EN 771-3,  Tolerance category D1.
Unit length and height  +3, -5mm.
Unit width average  +3, -5mm.

 

Physical Properties

Relationship of density / strength approx (solid units).
EN772-13 Gross Dry Density - Category II Materials.
3.6 N/mm2 Solid- 650 Kg/m3.

 

Unit and Laid Weights

TABLE 1 – UNIT AND LAID WEIGHTS

 

UNIT WEIGHT
(kg)

LAID WEIGHT INC MORTAR
(kg/m2)

3.6N/mm2

3.6N/mm2

OPTILYTE
75mm*

4.6

54

OPTILYTE
100mm

6.1

72

OPTILYTE
140mm*

8.6

101

OPTILYTE
215mm**

13.2

155

* to special order ** 100m laid flat

  

Strength

Minimum compressive strength of Optilyte Solid units is 3.6 N/mm2.

 

Design Properties

 

Water Vapour Permeability

EN 1745 Table A3 Water vapour diffusion coefficient μ 5/15.

 

Modulus of Elasticity

Static modulus of Optilyte is approximately 3-8kN/mm2.

 

Moisture Movement

As tested to EN 772-14.
Total movement = 0.42 mm/m. 

 

Durability against freeze thaw

Frost-resistance in accordance with PD 6697. Not to be exposed.

 

Shear Bond Strength

Declared Value 0.15N/mm2 in accordance with EN 998-2 Annex C.

 

Thermal Movement

Coefficients of linear expansion is 10 x 10-6 /0C.

 

Thermal Conductivity

The thermal conductivity of Optilyte ultra lightweight units has been tested by an independent laboratory and is supported by British Calibration Service Approval Test Certificates.

 

TABLE 2 – THERMAL CONDUCTIVITY 

 OPTILYTE 3.6N/mm2

W/mK (LAMDA VALUE)
MOISTURE CONTENT

3%
0.19

5%
0.21

 

Thermal Resistance

The equivalent thermal resistance of Optilyte units shown in the table has been calculated in accordance with the procedure laid down in the CIBSE Guide A3 1999.

 

TABLE 3 – THERMAL RESISTANCE

SOLID FORMAT: THERMAL RESISTANCE 'R' m2K/W

WIDTHS mm

75

100

140

3% m/c

0.38

0.50

0.70

 

The above values have been adjusted for mortar bridging to comply with Approved Documents L1 2010.

 

Sound Insulation

The sound reduction value of walls constructed of Optilyte units is based on the mass law approach, 100 - 3150 Hz frequency range. A single leaf partition wall plastered both sides using a 100mm Solid unit will give a sound reduction of approximately 40dB.

 

Fire Resistance

Expanded clay aggregate  is processed at approximately 1150ºC - melting point in excess of 1250ºC.
Optilyte units are non-combustible and classified Euroclass A1 to EN ISO 1182.

The following Fire Resistance table is based upon EN 1996–1–2: 2005, Table NA.3.1 and NA.3.2.  These are valid for walls without finishes, designed to EN 1996,Part 1–1.

 

TABLE 4 – FIRE RESISTANCE (HOURS)

 

 

     BLOCK THICKNESS (mm)

(CRITERIA)

75

100

140

SOLID UNITS

NON-LOADBEARING                   

(E1)

2

4

4

LOADBEARING                    

(RE1)

-

2

3

The application of plaster finishes to the blockwork will increase the fire resistance period.

 

High Insulation

 

Lower Shrinkage

 

Lower Site Breakage

 

Good Fixability

 

Excellent Plaster Key

 

Sitework

It is advisable to store Optilyte units clear of the ground and to provide weather protection for the packs and incomplete work. We recommend that packs be stored on site no more than two cubes high.

 

Quality Control

Interfuse Ltd operates a formalised Quality Assurance system at both Syston and Gainsborough plants. All masonry units are subject to stringent quality control checks and are tested daily in our own laboratory. A documented factory production control system is in operation with regular checks made on raw materials, production and finished units. A stock control system is in operation with written procedures for non-conforming products. All products are produced to the current European Standards.

 

Marking

Each pack is marked for traceability of product and unit clarification as given on the delivery ticket.

 

Sustainability

The environmental impact of Optilyte constructions can be assessed by referring to BRE’s Green Guide to Specification, with many constructions achieving the highest  A or A+ rating.

At the end of the life of the building, Optilyte units, which are inert, can be crushed down and recycled.  Their use in buildings will far exceed the usual 60-year design life expectancy, making Optilyte a very sustainable material.  

 

Delivery

Optilyte ultra lightweight units are delivered in crane off loaded packs from our two factories at Syston and Gainsborough. Banding and shrink wrapping available on request subject to special quotation.

Prices Quoted per 10 units (9.88 blocks per m2).

 

TABLE 5 - DELIVERY LOAD DATA

 

APPROXIMATE NO. OF OPTILYTE UNITS PER LOAD

100mm SOLID 3.6N/mm2

19T RIGID

1620

24T ARTIC

2160

90 UNITS PER PACK

 

 

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