Building Blocks Technical

CAD Drawings & PDFs

DWG Files	Acrobat Files
240_Detail.dxf	240_Detail.pdf
190mm_Thermal_block_Footing_detail.dwg	190mm_Thermal_block_Footing_detail.pdf
190mm_Thermal_block_Window_detail.dwg	190mm_Thermal_block_Window_detail.pdf
190mm_Thermal_block_Window_Sill_detail.dwg	190mm_Thermal_block_Window_Sill_detail.pdf
Thermal_Block_Course_Layout.dwg	Thermal_Block_Course_Layout.pdf
Typical_Thermal_Block.dwg	Typical_Thermal_Block.pdf
Thermal_Wall.dwg	Thermal_Wall.pdf
190mmH_x_140mmW_Lintel_detail.dxf	190mmH_x_140mmW_Bond_Beam_Detail.pdf
190mmH_x_190mmW_Bond_Beam_Detail.dxf	190mmH_x_190mmW_Bond_Beam_Detail.pdf
190mmH_x_190mmW_Lintel_detail.dxf	190mmH_x_190mmW_Lintel_detail.pdf
2020_knockout_block_to_box_slab.dxf	2020_knockout_block_to_box_slab.pdf
390mmH_x_140mmW_Bond_Beam_Detail.dxf	390mmH_x_140mmW_Bond_Beam_Detail.pdf
390mmH_x_140mmW_Lintel_detail.dxf	390mmH_x_140mmW_Lintel_detail.pdf
390mmH_x_190mmW_Bond_Beam_Detail.dxf	390mmH_x_140mmW_Bond_Beam_Detail.pdf
390mmH_x_190mmW_Lintel_detail.dxf	390mmH_x_190mmW_Lintel_detail.pdf
Aluminium_Frame_Connection_detail.dxf	Aluminium_Frame_Connection_detail.pdf
Articulation_Joints.dxf	Articulation_Joints.pdf
Control_Joint_above_window.dxf	Control_Joint_above_window.pdf
Control_Joint_at_Window.dxf	Control_Joint_at_Window.pdf
Control_Joint_through_bond_beam.dxf	Control_Joint_through_bond_beam.pdf
Precast_Alternative_190mm_techdry_blocks.dxf	Precast_Alternative_190mm_techdry_blocks.pdf

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Thermal Test Results

190mm Tech-dry Thermal blocks® have been tested to achieve a R. value of 2.226. An even higher result can be achieved with rendering and or plaster lining to the internal and external walls.Please view below for the engineer calculated 190mm & 240mm blocks with or without plaster lining as options.

THERMAL RESISTANCE OF TECH DRYTHERMAL BLOCKS

Summary
The following calculated tables should be read in conjunction with the data attached below.Further test results will be available in early 2008 once a test facility in Melbourne is commissioned.

1600 Lightweight Blocks 190 mm and 240 mm, With and Without Stud & Plasterboard
		190mm Blocks 5mm Render both sides	240mm Blocks 5mm Render both sides	190mm Blocks with 22mm Airspace & 10mm Plaster one side	240mm Blocks with 22mm Airspace & 10mm Plaster one side
Total thermal resistance	m².K/W	2.06	2.07	2.07	2.14
External render	mm	5	5	5	5
External leaf thickness	mm	190	240	190	240
Reflective airspace	mm	0	0	22	22
Plasterboard	mm	0	0	0	0
Internal render	mm	5	5	0	0
Width of insulation in cores	mm	80	70	40	40
Maximum density of concrete	kg/m³	1600	1600	1600	1600

Appendix 1 – Details

Block Description
Refer to photos of a proposed concrete block with polystyrene inserts.

Block widths 190mm or 240 mmOne core per block
Maximum face shell and web dimensions as tabulated
Maximum web thickness (at narrowest point) 20 mm
Web rebate 100 mm
The blocks are made with a vertical rebate down each end of the block which the polystyrene slides into (the shell thickness that meets the batt is 20mm each end).
The block may be either denseweight (< 2180 kg/m3) or lightweight (< 2180 kg/m3) as tabulated.

Thermal Conductivity of Polystyrene
Based on the following information for polystyrene, provided by RMAX, the thermal conductivity, k is taken as 0.34 W/m.K. This corresponds with other published data.

Thickness mm m2	R m².K/W
50	1.47
55	1.62
60	1.76
65	1.91
70	2.06

Polystyrene Insert Description

The polystyrene batt shown in the photograph is 50mm thick but is normally up to 75mm thick. The minimum thickness of polystyrene to achieve the thermal resistances is tabulated and varies up to 100 mm.
Polystyrene protrudes by 10mm through the block to touch the polystyrene above, as well as protruding out the sides 5mm each end to touch the polystyrene each side in the eighbouring block.

Render Description

Internal lightweight render thickness – 5mm
External lightweight render thickness – 5 mm

Battens, Plasterboard and Reflective Airspace
Where specified in the tables, the battens, plasterboard and reflective airspace shall be as follows.

Battens shall be wide spaces and include a thermal break (insulating material to reduce thermal bridging).
Both surfaces of the air space shall incorporate reflective material of low emissivity.

Plasterboard shall be a minimum of 10 mm thick.

Appendix 1

1600 kg/m³ Lightweight Blocks 190 mm and 240 mm, With and Without Stud & Plasterboard

Climate zone			7	7	7	7
Required thermal resistance	R	m².K/W	1.90	1.90	1.90	1.90
Total thermal resistance	R	m².K/W	2.06	2.07	2.07	2.14
Is there sufficient thermal resistance?			OK	OK	OK	OK
Is there sufficient thermal resistance?			1.08	1.09	1.09	1.12

Wall Properties
External air film		mm	0.8	0.8	0.8	0.8
External render		mm	5	5	5	5
External leaf thickness		mm	190	240	190	240
Cavity width		mm	0	0	0	0
Internal masonry leaf		mm	0	0	0	0
Airspace		mm	0	0	0	0
Reflective airspace		mm	0	0	22	22
Plasterboard		mm	0	0	10	10
Internal render		mm	5	5	0	0
Internal air film		mm	3.2	3.2	3.2	3.2

Thermal conductivity of external air film	k	W/m.K	0.026	0.026	0.026	0.026
Thermal conductivity of exernal render	k	W/m.K	0.400	0.400	0.400	0.400
Thermal conductivity of external leaf thickness	k	W/m.K	0.870	0.870	0.870	0.870
Thermal conductivity of cavity	k	W/m.K	0.026	0.026	0.026	0.026
Thermal conductivity of internal masonry leaf	k	W/m.K	0.870	0.870	0.870	0.870
Thermal conductivity of airspace	k	W/m.K	0.026	0.026	0.026	0.026
Thermal conductivity of reflective airspace	k	W/m.K	0.000	0.000	0.036	0.036
Thermal conductivity of plasterboard	k	W/m.K	0.170	0.170	0.170	0.170
Thermal conductivity of internal render	k	W/m.K	0.400	0.400	0.400	0.400
Thermal conductivity of internal air film	k	W/m.K	0.026	0.026	0.026	0.026

Resistance of external air film	R	m².K/W	0.03	0.03	0.03	0.03
Resistance of external render	R	m².K/W	0.01	0.01	0.01	0.01
Total thermal resistance of block	R	m².K/W	1.88	1.89	1.22	1.29
Resistance of cavity	R	m².K/W	0.00	0.00	0.00	0.00
Resistance of internal masonry leaf	R	m².K/W	0.00	0.00	0.00	0.00
Resistance of airspace	R	m².K/W	0.00	0.00	0.00	0.00
Resistance of reflective airspace	R	m².K/W	0.00	0.00	0.62	0.62
Resistance of plasterboard	R	m².K/W	0.00	0.00	0.06	0.06
Resistance of internal render	R	m².K/W	0.01	0.01	0.00	0.00
Resistance of internal air film	R	m².K/W	0.12	0.12	0.12	0.12
Total thermal resistance	R	m².K/W	2.06	2.07	2.07	2.14

Are cores filled with air(a) or insulation (i)?			i	i	i	i
Are web rebates filled with air?			i	i	i	i
Are joint spaces filled with air?			i	i	i	i
Width of insulation in cores		mm	80	70	40	40
Width of insulation in web rebate		mm	80	70	40	40
Width of insulation in joint spaces		mm	80	70	40	40
Is insulation width small than core width?			OK	OK	OK	OK
Insulation width / core width			0.65	0.40	0.32	0.23
Density of concrete	Dens	kg/m³	1600	1600	1600	1600
Thermal conductivity of concrete face shells	k_f	W/m.K	0.515	0.515	0.515	0.515
Thermal conductivity of webs	k_w	W/m.K	0.515	0.515	0.515	0.515


Thermal conductivity of cores	k_c	W/m.K	0.034	0.034	0.034	0.034
Thermal conductivity of web rebates	k_r	W/m.K	0.034	0.034	0.034	0.034
Thermal conductivity of joint space	k_j	W/m.K	0.034	0.034	0.034	0.034

Block length		mm	390	390	390	390
Block height		mm	190	190	190	190
Block width		mm	190	240	190	240
Joint thickness		mm	10	10	10	10
Outer face shell		mm	33	33	33	33
Inner face shell		mm	33	33	33	33
Web rebate depth		mm	100	100	100	100
Web 1 thickness		mm	20	20	20	20
Web 2 thickness		mm	0	0	0	0
Web 3 thickness		mm	20	20	20	20
Number of cores		mm	1	1	1	1
Core length		mm	350	350	350	350
Core width		mm	124	174	124	174
Material thickness		mm	72	74	72	74
Material thickness		%	38%	31%	38%	31%
Surface density		kg/m²		115	119	115
Gross density		kg/m³		607	496	607
Web area ratio		–	4.5%	4.5%	4.5%	4.5%
Core area ratio		–	83.1%	83.1%	83.1%	83.1%
Web rebate area ratio		–	5.0%	5.0%	5.0%	5.0%
Joint area ratio		–	7.4%	7.4%	7.4%	7.4%
Are area ratios consistent			OK	OK	OK	OK
Resistance of webs	R	m².K/w	0.241	0.338	0.241	0.338
Resistance of cores	R	m².K/w	2.493	2.199	1.316	1.316
Resistance of rebates	R	m².K/w	2.493	2.199	1.316	1.316
Resistance of joint space	R	m².K/w	2.493	2.199	1.316	1.316
Effective resistance of cores/webs/rebates/joint space	R	m².K/w	1.754	1.762	1.096	1.165
Resistance of outer face shell	R	m².K/w	0.064	0.064	0.064	0.064
Resistance of inner face shell	R	m².K/w	0.064	0.064	0.064	0.064