1 scope
This technology is applicable to industrial
and civil construction works roofing loose, slab thermal insulation materials
and in-situ insulation layer of construction as a whole.
2 construction preparation
2.1 materials and requirements:
2.1.1 material technical properties such as
density, thermal conductivity, and must comply with the design requirements and
specification for construction and acceptance of provisions of the test data.
Loose insulation using inorganic materials,
such as the selection of organic material, material should be treated.
2.1.2 material:
2.1.2.1 loose materials: cinder or slag,
particle size is generally 5~40mm, shall not contain stones, dirt, heavy slag
and coal burning at the end, 500~800kg/M3 bulk density, thermal conductivity
for 0.16~0.25W/m · K。 Expansion coefficient of vermiculite Shi Daore 0.14W/m · K。
2.1.2.2 slab thermal insulation materials:
certificate of products should be manufactured, according to the thickness of
the design requirements, the specification should be consistent appearance
should be neat; density, thermal conductivity, strength, the design
requirements.
A. foamed concrete plates: density is not
greater than 500kg/M3, compressive strength shall not be less than 0.4MPa;
B. aerated concrete block: apparent density
500~600kg/M3, compressive strength shall not be less than 0.2MPa;
C. polystyrene Board: density of ≤ 45kg/M3,
the compressive strength of not less than 0.18MPa, the thermal conductivity is
0.043
W/m· K。
2.2 the main tools:
2.2.1 mobile machines: mixers, vibrating
Board.
2.2.2 tools: flat shovels, wood scraper
bars, horizontal ruler, trolley, wood bat, wood float, and so on.
2.3 operating conditions
2.3.1 laid the base of insulation
(structures), construction finished, the processing units hook, should cement
mortar, after inspection acceptance, before laying insulation material.
2.3.2 laying across the atmosphere should
first clean the surface of the roof, and drying, smooth, without defects such
as loose, cracking and hollowing; air-insulation layer structure must comply
with the design requirements and specification for construction and acceptance
of rules.
2.3.3 there through pipe root parts,
packing density of fine stone concrete, so that the pipe fixed.
2.3.4 slab thermal insulation materials
transportation, storage should be protected against damage and moisture.
3 operational processes
3.1 process:
Grass-roots cleanup → line → tube
fixation → construction → thermal insulation layer of air-insulation layer → laying
screed
3.2 basic cleanup: precast or cast-concrete
structure surface should clean up the debris and dust.
3.3 line slope: design gradient and flow
direction, find the roof slope to determine insulation layer thickness range.
3.4 fixed: put onion structure in front of
the heat preservation layer construction, application of fine stone concrete
block density.
3.5 the reservoir construction: 2~4 process
is completed, designed roof insulation gas requirements, design should be done
across the atmosphere, brushing even leakage-free brush.
3.6 laying of insulation layer:
3.6.1 laying loose insulation layer:
3.6.1.1 loose insulation layer: it is a dry
practice construction methods, material slag use slag or water, diameter of
5~40mm. It must be used with screening, control moisture. Lay the loose
structure of the material surface should be dry, clean, loose insulation
material should be layered, proper compaction, compaction levels should be
designed according to the needs of density, determined by experiment. Each step
of laying thickness not greater than 150mm, the roof insulation layer of
directly after compaction stroller walks and stacking heavy loads.
3.6.1.2 loose vermiculite insulation layer:
vermiculite size is generally 3~15mm, swollen vermiculite when laying
perpendicular to the bedding plane and heat flow.
3.6.1.3 loose expanded perlite insulation
layer: perlite particle size should not be greater than the content of less
than 0.15mm 8%.
3.6.2 plate laying of insulation layer:
3.6.2.1 deck block insulation layer: laying
directly on the structure or the gas, when layered two layers plate joints
should be staggered, side by two adjacent plates thickness on the surface
should be consistent. Massive wet slope with loose material on the insulation
layer.
3.6.2.2 bond-ply plate-like insulation
layer: bonding material for plate-like insulation material stuck to the roof on
a grass-roots, generally with the cement and lime mortar mix; polystyrene
material asphalt binder paste.
3.6.3 overall insulation layer:
3.6.3.1 insulation layer of cement-lime
slag: slag with lime water bored before construction, not less than 3D, stuffy
cinder or slag should be before screening, particle size control in 5~40mm.
Best used mechanical mixing and mix cement: lime: slag for 1:1:8, when laying
layers, roll, control the density of virtual shop the thickness and design
requirements, through testing, ensure insulation.
3.6.3.2 cement leech stone insulation
layer: is to expansion leech stone for set material, and cement for rubber gel
material, usually with General Portland cement, minimum label for No. 425,,
expansion leech stone grain diameter selection 5~20mm, General tie than for
cement: leech stone =1:12, added water mix collection Hou, with hand hold into mission
not bulk, and slightly water mud drops Xia Shi for good. Mixing vermiculite
particle breakage, it should by manual mixing. Manual mixing is the first water
and even tune into a slurry of cement and cement on the vermiculite evenly
without quantitatively, splashed with mix until uniform. Lay the insulation
layer, virtual paving thickness design of thickness of 130%, wooden clappers
and shoot it, leveling, pay attention to flashing slope.
4 quality criteria
4.1 project:
4.1.1 insulation material for strength,
density, thermal conductivity and water content must comply with the design
requirements and the provisions of the code for construction and acceptance of
material specification data.
4.1.2 according to the design requirements
and norms used ratio and binders.
4.2 Basic project:
4.2.1 loose insulation material: layered,
compacted properly, surface roughness, slope is correct.
4.2.2 plate insulation should be close to
the grass-roots lay, steady way, find the correct, insulation layer should be
staggered and workmanship in compact.
4.2.3 overall insulation layer: mix of
materials should be uniform, layered, compacted properly, surface roughness,
slope is correct.
4.3 allowable deviation, as shown in table
10-l.
Heat insulation (heat insulation) layer
method for the determination of tolerances and table 10-l
Project tolerance (mm) method
No leveling layer 5
Overall insulation layer surface roughness
on the screed 7 2m m on foot and wedged foot check
Loose material +10 δ/100
Δ/2 overall insulation thickness-5 100 with steel inserts and check
The tabular material δ/100 ± 5 and not more
than 4
3 insulation panels adjacent to height
difference 3 using a ruler and a wedge-shaped feeler Gage check
Note: δ means the insulation thickness.
5 finished product protection
5.1 the gas before the construction, the
grass-roots level should be the surface of the sand, soil, lumps and other
debris clean up, keep the trap effect.
5.2 in the paved loose, plate, or the whole
construction of thermal insulation layer shall not, and shall take the
necessary measures to ensure the insulation is not damaged.
5.3 insulation after construction is
complete, should be laying cement mortar screeds to ensure insulation effect.
6 quality problems to be noticed
6.1 function of thermal insulation layer:
thermal conductivity of insulation materials, particle size gradation of shop,
water content, density, construction materials used shall meet the technical
standards, control effect of density and insulation functionality.
6.2 laying thickness is not uniform: laying
without serious action. Pull line slope, spread along the flat, operations
should avoid the accumulation of material on the roof twice out of luck. To
ensure homogeneous paving.
6.3 quality of insulation at the corner of
problem: edges are not straight, edge Cha ragged, affect the slope, looking for
peace and drainage.
6.4 insulation tile plates are not real:
effect of thermal insulation, waterproofing, causing cracks in screed. Should
strictly meet the specifications and evaluation criteria standard of quality
inspection and acceptance of strict management.
7 quality records
This standard shall meet the following
quality records:
7.1 materials should experiment with
density and thermal conductivity.
7.2 friable material particle size,
density, gradation of information.
7.3 materials should have a factory
certificate.
7.5 quality checking and evaluation of
information.
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