CROSS REFERENCE TO RELATED APPLICATIONS
[001] This patent application does not claim priority from any application.
TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a portable
device for testing the infiltration rate of water through a pervious concrete.
BACKGROUND
[003] At present, pervious concrete is a special type of concrete that allows water to
pass through it, which reduces runoff from the site and allows ground water recharge.
[004] Currently, there is no such apparatus which can be used for lab testing of the
pervious concrete. Conventional methods include use of heavy buckets to be lifted for testing.
[005] CN204359656, discloses a method of indoor soil infiltration rate measuring
device which has a constant water head with a ring knife. The system so developed is
inefficient to be used for pervious concrete.
[006] CN105784560, discloses a device for soil infiltration using a rainfall
stimulating device. The device is expensive enough for laboratory use. The device is sensitive
enough for robust use in field testing.
[007] Hence, it is clear from the above stated prior art that till date the testing
devices are for soil infiltration or pervious concrete are highly costly and over sensitive for
use.
[008] The present invention addresses these and other shorting comings of the prior
art.
SUMMARY
[009] Before the present systems and methods, are described, it is to be understood
that this application is not limited to the particular systems, and methodologies described, as
there can be multiple possible embodiments which are not expressly illustrated in the present
disclosure. It is also to be understood that the terminology used in the description is for the
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purpose of describing the particular versions or embodiments only, and is not intended to
limit the scope of the present application. This summary is provided to introduce a device for
laboratory testing of pervious concrete and the concepts are further described below in the
detailed description. This summary is not intended to identify essential features of the
claimed subject matter nor is it intended for use in limiting the scope of the claimed subject
matter.
[0010] In one implementation, a system for testing the infiltration rate of pervious
concrete with a timer and calculation based on water flow within fixed timeline.
[0011] In another implementation, the present invention will help you to decide from
the number of pervious concrete mixtures that which type of mixture suits best for the
particular type of terrain/ ground. Up to the present time we are measuring the infiltration rate
of pervious concrete only when it is placed on the ground.
[0012] In one implementation, a device for measuring infiltration rate of pervious
concrete which has a storage tank on a movable trolley connected to a graduated cylindrical
tube having a water conduit.
[0013] In another implementation, a method for testing different samples of pervious
concrete which are prepared though the casting or testing moulds for testing of the pervious
concrete.
[0014] In one embodiment, the device works through manual as well as automated
working through mobile or smart phone.
[0015] Alternatively, the testing pervious concrete may be clogged specifically using
sand or other materials and then the life of pervious concrete can be tested.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The foregoing detailed description of embodiments is better understood when
read in conjunction with the appended drawings. For the purpose of illustrating the
disclosure, example constructions of the disclosure are shown in the present document;
however, the disclosure is not limited to the specific methods and apparatus disclosed in the
document and the drawings.
[0017] The detailed description is given with reference to the accompanying figures.
In the figures, the left-most digit(s) of a reference number identifies the figure in which the
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reference number first appears. The same numbers are used throughout the drawings to refer
like features and components.
[0018] Figure 1 illustrates a three dimensional view of the device.
[0019] Figure 2 illustrates a three dimensional view of casting or testing moulds.
[0020] Figure 3 illustrates the casting or testing mould with different markings.
DETAILED DESCRIPTION
[0021] Some embodiments of this disclosure, illustrating all its features, will now be
discussed in detail. The words "comprising," "having," "containing," and "including," and
other forms thereof, are intended to be equivalent in meaning and be open ended in that an
item or items following any one of these words is not meant to be an exhaustive listing of
such item or items, or meant to be limited to only the listed item or items. It must also be
noted that as used herein and in the appended claims, the singular forms "a," "an," and "the"
include plural references unless the context clearly dictates otherwise. Although any systems
and methods similar or equivalent to those described herein can be used in the practice, the
exemplary, systems and methods are now described. The disclosed embodiments are merely
exemplary of the disclosure, which may be embodied in various forms.
[0022] Various modifications to the embodiment will be readily apparent to those
skilled in the art and the generic principles herein may be applied to other embodiments.
However, one of ordinary skill in the art will readily recognize that the present disclosure is
not intended to be limited to the embodiments illustrated, but is to be accorded the widest
scope consistent with the principles and features described herein.
[0023] The present invention consists of a water storage tank mounted over a
hemisphere having a capacity to hold water. The storage tank is rested over a movable or
fixed trolley whose height can be adjusted cording to the height of the testing or casting
mould. The device further contains a graduated cylindrical tube to measure the initial and
final height of water in the water tank. The hemisphere water tank further is connected to a
conduit with an on and off valve for varying the rate of flow of water.
[0024] In addition to the above, the present invention further facilitates by providing
different casting moulds or testing moulds which can be used for different types of concrete.
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The concretes can also be artificially clogged and further testing can be done to check the life
of the concrete.
[0025] While aspects of described system can be totally dismantled and reassembled
again to facilitate transportation at various onsite or road site testing.
[0026] Referring now to Figure 1, the water storage tank (1) rests on a trolley (2)
which has wheels (3). The water storage tank (1) has a graduated cylindrical tube (4) for
measuring the amount of water being transferred to the testing moulds. At the base of the
water storage tank (4) is a water conduit or pipe (5) which is further connected to a valve (6)
having a lever (7) to facilitate the free flow of water.
[0027] Referring now to Figure 2, the casting moulds (9) can be dismantled and
rearranged by using bolts (10) for casting different shapes and sizes of pervious concrete.
[0028] Referring now to Figure 3, the inner system of the casting mould consists of
markings to maintain the minimum to maximum level of water in the previous concrete.
[0029] In further embodiments, the experimental procedure consists of filling the
storage tank (1) with water of desired quantity and pouring the water on the pervious concrete
specimen in the casting or testing mould (9) at the rate so that the head of the water on the
pervious concrete is maintained between the maximum and minimum level marks as
illustrated in Fig.-3. The minimum level of the water should be at 10mm higher than that of
the pervious concrete whereas the maximum level of the water should not be higher than that
of 15mm from the maximum level of the concrete.
[0030] The graduated cylindrical tube (4) the graduated cylindrical tube in the
experimental setup indicates the level of water in the water tank. Every 3.15mm drop in the
level of water from the graduated cylindrical tube indicates the release of 1 liter of water from
the on/off valve.
[0031] The stop watch (8) any time piece can be used to measure the time taken by
water to infiltrate the pervious concrete sample, preferably use stop watch.
[0032] In further embodiments the calculation is done by using the following formula
i.e. I=KM/D2
Where I = infiltration rate, mm/hr (inch/hr)
M = mass of infiltrated water Kg (lb)
D = inside diameter of infiltration ring mm (inch)
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t = time required for measured amount of water to infiltrate the concrete in seconds
K = constant (126870 inch-pound)
[0033] The casting/ testing moulds are designed in such a way that, both casting and testing
of the pervious concrete sample can be done in a same mould without withdrawing the casted
concrete out from the mould.
[0034] After the maturing period of the pervious concrete sample, mark or draw three lines
on the inner surface of the mould indicating maximum level of pervious concrete, minimum
level of water head and maximum level of water head respectively. The bottom most line or
first line indicates the casting level or maximum level of pervious concrete. The middle or
second line is drawn on 10mm above first line and it indicates the minimum water level that
should be maintained during the test. The third line is drawn 15mm above from first line i.e.
5mm above from second line and it indicates the maximum water level that should be
maintained during the test.
[0035] Before placing the mould under the on/off valve, plumber putty or sealant is applied
on the inner boundaries of the mould so as to resist or avoid the water to can pass through the
inner smooth boundaries of the mould.
[0036] After placing the mould under the on/off valve the centering of mould is required
which is done by releasing some drops of water from the on/off valve by opening the lever
and center location of the mould is achieved and can be adjusted accordingly.
[0037] After marking, applying putty, placing and centering, remove the dust from the
surface of the pervious concrete sample, if any. The pre-wetting of pervious concrete sample
is done before taking the actual reading for the infiltration rate. For pre-wetting of the
pervious concrete sample use 11.43 mm height of the water from the graduated cylinder
attached to the water storage tank, or when on/off valve is open the drop in the level of the
water from the graduated cylindrical tube is 11.43mm. Start the actual test within two
minutes after the pre-wetting of the pervious concrete sample is done.
Example to calculate the infiltration rate of water via pervious concrete sample
[0038] To calculate the infiltration rate of the water via pervious concrete sample, we need to
measure the time taken by 40 lb of water to pass through the pervious concrete sample by
following procedure.
[0039] Note down the initial level of water in the graduated cylindrical tube. Start the
stopwatch and open the on/off valve so that the water should fall on the center of the sample
(as centering is already done during pre-wetting of the pervious). Use the lever of the on/off
valve to regulate the flow of the water. Maintain the head of the water between the middle
and the third line marked inside the casting/testing mould. During the test the water neither
reached below the minimum water level nor more than the maximum water level. When the
final reading on the graduated cylindrical tube reached the level of 57.15mm (i.e. the
difference between the initial and final reading of the water level on the graduated cylindrical
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tube id 57.15mm) close the valve and end the stopwatch. Note down the time, t taken by the
water to pass through the pervious concrete sample.
[0040] Now use the following formula to calculate the infiltration rate.
I=KM/D2t
Where I = infiltration rate, mm/hr (inch/hr)
M = mass of infiltrated water Kg (lb)
D = inside diameter of infiltration ring mm (inch)
t = time required for measured amount of water to infiltrate the concrete in seconds
K = constant (126870 inch-pound)
Example
Time was coming 68 seconds
Use all values in below formula
I= (126870)*(40) / (122)*(68)
I= 518.259 in/hr
The required range for the concrete to be pervious is 430 in/hr to 783 in/hr
Thus the concrete tested is pervious
[0041] Example
I=?
M= 40 lb
D= 12 inch
T= 68 seconds (measured)
K= 126870 (constant)
I=KM/D2
I= (126870)*(40) / (122)*(68)
I= 518.259 in/hr
[0042] Exemplary embodiments discussed above may provide certain advantages. Though
not required to practice aspects of the disclosure, these advantages may include those
provided by the following features.
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[0043] Some embodiments enable a device for laboratory testing of the pervious concrete.
[0044] Some embodiments enable a device which can be used for onsite testing also.
[0045] Some embodiments enable a device which is completely detachable for easy transport.
[0046] Some embodiments enable a device which can use different types of casting moulds.
[0047] Some embodiments enable a system for testing the infiltration rate of pervious
concrete.
[0048] Some embodiments enable a system for clogging the pervious concrete and checking
the life of the pervious concrete.
[0049] Some embodiments enable a system and calculation of infiltration flow rate through
the pervious concrete.
[0050] Some embodiments work according to American society for testing and materials
code c1701.
[0051] Some embodiments include the variation of the tank size and graduated cylindrical
tube including conduit and on/off lever for 40lb water to pass through the pervious concrete.

I/We claim:
1. A device for testing of pervious concrete, wherein the device comprising:
a water storage tank (1) with a trolley (2) has a graduated cylindrical tube (4) for
measuring the amount of water being transferred to the testing moulds (9) within time
calculated by stop watch (8).
2. The device of claim 1 further comprises at the base of the water storage tank (4) is a
water conduit or pipe (5) which is further connected to a valve (6) having a lever (7)
to facilitate the free flow of water.
3. The device of claim 1, wherein the trolley (2) can have wheels (3) for movement or
can be fixed at a position.
4. The device of claim 1, wherein the stop watch (8) is digital or mechanical.
5. The device works on level of water to be maintained within the marking given on
casting or testing moulds (9).
6. The device of claim 1, wherein the lever (7) has a valve (6) which is single way valve.
7. A device as claimed in any of the preceding claims has casting or testing moulds (9)
which can be dismantled using nut bolts (10).
8. A device as any of the preceding claims has casting or testing moulds (9) of variable
sizes.
9. A device as any of the preceding claims can be dismantled and rearranged as per the
requirement.
10. A device as any of the preceding claims can be used for field testing and laboratory
testing.