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Sunday, November 28, 2021
KP astrology - BTR
Sunday, November 21, 2021
Advantages and disadvantages of Moisture curing coating, sealant, adhesives, materials:
A moisture-curing product is cured due to the presence of moisture in the atmosphere. These form a protective coating/matrix / reach the final stage by reacting chemically with the moisture in the air. Moisture curing materials are more applied on roofs, the outer surfaces of buildings, and on marine equipment and vessels because they can cure in the moist air for works like flooring, tiling, insulation, roofing, and wall covering.
Below are few points (Moisture cure coatings, moisture cure sealants, moisture cure adhesive):
1. Moisture-cures are that they offer resistance to
ponding water.
2. Moisture curing sealant/coatings/material produce
a highly reflective surface and possess good adhesion properties.
3. Moisture-curing coatings also prevent pitting
corrosion and bacterial corrosion on marine machinery.
4. Generally, they come in one component
5. Moisture cures show good thermal-mechanical and
weathering properties and are widely used in reactive hot melt adhesives and
coatings.
6. Moisture cures bond with surfaces that are
difficult to bonds, such as wood-based materials, untreated metal, or plastics, delicate
and thin materials, like plastic panels, glass, and sheet metal fascia.
7. Moisture cures act as insulation material at
exterior applications that may be exposed to temperatures in excess of 100
degrees.
8. Moisture cures show the high elastic property in a very vast temperatures range.
9. Moisture cures can be applied on damp surfaces
and even in very low or negative temperatures.
10. Moisture cures forms: Permanently elastic, vibration-damping, compensate different thermal length expansions, Low to high viscosity for optimal application, Instant seal, Resistance to oils and chemicals, Flame retardant, Low to high thermal conductivity, Long-term resistance to harsh weather conditions, etc.
Sunday, November 14, 2021
Numerology - Challenge Number
Saturday, November 13, 2021
KP Astrology: House significations
From the birth / horrary chart and details, If the cuspal sub lord of a primary house signifies primary and supporting houses, the event is promised.
Step 3. When the event will happen?
Events happen when the planet-lords of the current dasa (dasa lord, antardasa lord, pratyantardasa lord, sookshma lord etc.) signify house group.
Sunday, November 7, 2021
Numerology - KUA Number / Angle Number
KUA Number / Angle Number – Calculation.
For Ex: DOB = 01-01-1980
Consider only yyyy = 1980 = 1+9+8+0 = 9
If you are male = 9-11=2
If you are female = 9+4=13 = 1+3=4
The West Group Kua numbers are 2, 5, 6, 7 and 8.
Find the below details:
KUA Numbers is called as Angle Numbers, you can write this number and keep in front of you always or write this number on hand, palm and wish for the best of luck.
Thanks for visiting.
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Monday, November 1, 2021
Sealant specification - SS-S-200E and SS-S-200D - US FEDERAL SPECIFICATION
US FEDERAL SPECIFICATION: SEALANTS, JOINT, TWO-COMPONENT, JET-BLAST-RESISTANT, COLD-APPLIED, FOR PORTLAND CEMENT CONCRETE PAVEMENT
a.
Type M - Machine application, fast curing
b.
Type H - Hand mixed, retarded cure
1)
The sealant shall be a combination of two
component materials, a base and a curing agent.
2)
The mixture of the materials shall be black.
3)
The mixture shall cure to form a resilient and adhesive
elastomeric compound which is resistant to the solvent action of jet fuel and
lubricating oils, and to the direct heat and blast of aircraft engines.
4)
The sealant shall effectively seal joints and
cracks in pavements against the infiltration of moisture and jet fuel
throughout repeated cycles of expansion and contraction, and shall not flow
from the joints or be picked up by pneumatic tires at in-place joint seal
temperatures of 60 degrees Celsius (deg C) (140 degrees Fahrenheit (deg F)) or
below.
5)
The mixed material shall have a uniform
application or pouring consistency suitable for completely filling the joint
without inclusion of blisters, bubbles, or discontinuities.
6)
Material shall be applicable at ambient
temperatures of 4 deg C (40 deg F) and above.
7)
When material is applied at ambient temperatures
of 16 deg C (60 deg F) and above, it shall cure to permit traffic on the
pavement within 3 hours after application of type M, or 12 hours after
application of type H, without wheel pickup.
7)
ü
Component A (curing agent). Component A shall
activate the polymer system to end point when mixed with component B.
ü
Component B (base resin). Component B shall be a
homogeneous mixture of polymer and filler, with activators, plasticizers,
gelling agents
ü
Primer is recommended by the manufacturer for a
specific surface, all tests and applications concerning adhesion shall include the
primer, applied in accordance with instructions provided by the manufacturer.
Primers shall be formulated to cure in not more than 1 hour, and shall remain
active for not less than 4 hours after application.
a.
Sealant shall be formulated for application with
pressurized mixing and extruding equipment. The equipment shall deliver the
components in the required ratio plus or minus 5 percent variation.
b.
Mixing ratio: Component A and component B shall
be supplied in pre-proportioned containers, in a volume ratio of 1:1.
c.
The viscosity of component A and component B,
each shall not exceed 200 pascal seconds (Pa.s) (200,000 centipoise (cP))
d.
Working life of the homogeneous mixture of
sealant shall be formulated for time duration allowing use of the specified
equipment to mix and extrude the material and to seal a prepared concrete
joint.
e.
The tack-free time shall not exceed 3 hours
after application.
a.
The sealant shall be formulated for manual
slow-speed electric or air-driven mixing, and pouring or extruding application.
b.
Mixing ratio: Component A and component B shall
be supplied in preproportioned containers.
c.
The viscosity of component A and component B
each shall not exceed 150 Pa.s (150,000 cP)
d.
The working life of the homogeneous mixture of
sealant shall be not less than 3 hours after mixing, as evidenced by viscosity
not exceeding 200 Pa.s (200,000 cP).
e.
The tack-free time shall not exceed 12 hours
after application.
Performance:
i.
Accelerated aging - no visual or physical change
during accelerated aging in sealed containers.
ii.
Self-leveling –
a.
Extruded or poured into a joint on a level
plane, shall flow to a variation of the surface not greater than 3.2mm (0.125
inch)
b.
Extruded into a joint on a 1.5 percent incline,
shall limit flow to a depth variation not-greater than 1.6 mm (0.063 inch).
iii.
Change in mass by fuel immersion
a.
Dry mass of the sealant after fuel immersion for
24 hours at 49 deg C (120 deg F) shall not exceed 2.0 percent.
b.
No apparent defects that will affect the
material as a sealant
iv.
Change in volume on exposure to elevated
temperature - When exposed to 70 deg C (158 deg F) for 168 hours shall not
exceed 5.0 percent
v.
Resilience:
a.
Recovery shall be a minimum of 75.0 percent
b.
The initial penetration shall not exceed 2.0 mm
(0.079 inch) and shall not be less than 0.5 mm (0.020 inch).
vi.
Artificial weathering - 160 hours of artificial
weathering shall not show surface softening, presence of an oil-like film,
reversion to a mastic-like substance, formation of surface blisters exceeding
the specified size and density, or an average change in volume exceeding 5.0
percent
vii.
Bond to concrete - None of the specimens shall
develop any surface checking or crazing, crack, separation, or other opening in
the sealant, or between the sealant and the concrete blocks, and there shall be
no surface hardening or loss of resilient, rubber-like characteristics in the
sealant.
viii.
Flame resistance - sealant shall not show any
evidence of ignition, support of combustion, hardening or loss of flexibility,
flow, or separation during heat exposure, or upon examination after cooling, or
any separation or loss of adhesive strength between sealant and concrete
blocks, when exposed to 260 deg C (5OO deg F) for 120 seconds
ix.
Flow - sealant shall show no evidence of
cracking, sag, or dimensional change, after 5 hours of exposure to 93 deg C
(200 deg F)
x.
Storage stability - sealant materials, when
stored in full, tightly closed containers for 6 months from the date of
delivery, at temperatures from 16 to 38 deg C (60 to l00 deg F), away from
direct sunlight and weather exposure.
xi.
Toxicity - The material shall have no adverse
effect on the health of personnel when used for its intended purpose.
Thanks to Google.com, 365Dna.com from where the details are
collected.
Mention your comments below….