FIRST, THE STONE WATER ABSORPTION RATE
The water absorption rate of stone refers to the ability of stone to
absorb water under standard atmospheric pressure. It is measured by
the amount of water absorbed by the stone and expressed as a
percentage. The water absorption rate of the stone is determined by
the number and size of the voids and the arrangement of the particles.
Whether the stone is prone to moisture and the removal of air from th
e gap depends on factors such as the air. The smaller the water
absorption rate, the tighter and harder the stone. For example, the
hard igneous rock often has a water absorption rate of less than 1%,
some dense sedimentary rocks are about 3%, and some loose
sedimentary rocks often reach 8% or more. The greater the water
absorption of the stone, the worse its engineering properties.
SECOND, THE REASON FOR DETECTING THE WATER
ABSORPTION RATE OF NATURAL STONE
First of all, we know that natural stone is composed of a variety of
minerals, which contain many chemically active substances, which are
very easy to react under the contact of water and oxygen. For example
, iron in stone is easy and Water and oxygen react to form rust,
which destroys the finish of natural stone and also changes the mineral
composition of the stone to reduce its engineering properties.
Secondly, the stone will reduce the adhesion between the particles
after water absorption, which will reduce the technical performance
of the stone itself, such as compressive strength and bending strength
will generally drop significantly, and it is prone to danger.
Third, if the water absorption rate of the stone is high, it will increase
its own weight. If the weight gain is too much, it will affect the original
design bearing capacity of the building, affect the service life of the
building and increase the safety hazard.
Fourth, the water absorption rate of the stone is high, so that the
water will enter the building along the gap of the stone, so that the
entire building is in a humid condition, and it is easy to produce various
aspects of aging corrosion.
The most important thing is that the stone with high water absorption
rate is prone to freezing and thawing. In places where the weather is
cold in the north, when the pores of the stone absorb enough water,
once the temperature drops below 0 °C, the water in the stone begins
to freeze and the volume expands. When the expansion force of the
ice block is greater than the structural force of the stone, the stone
will be broken.
There are also some natural stone (like limestone), which is easily
corroded by water and will be dissolved if it is absorbent.
THIRD, THE METHOD OF DETECTING THE WATER
ABSORPTION RATE OF NATURAL STONE
1. Preparation of equipment and measuring tools:
① Drying box - The temperature can be controlled within the range of
60 ° ± 2 ° C.
② balance - The maximum weighing mass is 1000g and the sensitivity is
2. Samples and test procedures:
① sample - the sample should be side length: 100mm × 100mm, and the
thickness is the thickness used. The number of samples per test is 6.
②Test procedure - The sample was first washed with water, dried,
placed in a constant temperature oven at 60 ° ± 2 ° C for 48 hours to
constant weight, and then placed in a desiccator to cool to room
temperature. At this point, the mass (W1) reading is taken, accurate
to 0.01g. After immersing the sample in clean water at 20 ° ± 5 ° C for
48 hours, remove the water from the surface of the sample with a
wrung towel and immediately weigh the mass (W2) to the nearest 0.01 g
3. Calculation method of water absorption rate of stone:
①W = (W1-W2) / W1 × 100 where W-sample water absorption, %;
W1-sample dry mass, g; W2-sample water saturation mass, g.
② The arithmetic mean of the water absorption of each group of 6
samples was taken as the water absorption rate of the variety.
4. Stone water absorption report:
① should include the average and standard deviation of the water
absorption of the sample. Sample name, variety and number. Sample
size and quantity. Test Conditions. Information about the test unit.
- Stone-basalt Fiber, Green Clean
- Artificial Stone On A Tall Wall
- Brief Method Of Brick Masonry And Its Character...
- Ledge Stone Smart Choice To Buy You Need To Know
- Artificial Culture Stone Manufacturers Developm...
- Marble Cleaning Method
- Buy Artificial Cultural Stone Needs To Pay Atte...
- The Formation Process Of Marble
- Installing Granite Countertops Should Be How To...
- Sandstone In The Decoration Stone Rising
- How To Typeset Before Paving The Landscape Ston...
- Knowledge/ Advantages Of Marble Skirting
- Appreciation/ The Application Of Volakas Marble
- Advantages/Why Do You Have To Choose Marble For...