 DRAFT UGANDA STANDARD  
  DUS 2274  
First  Edition  
2023 -07-24 
 
 
 Reference number  
DUS 2274: 202 3 
© UNBS 202 3  
  
Integral waterproofing compounds for cement mortar and 
concrete — specification  
 DUS 2274 : 2023 
ii © UNBS 2021 – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contrac t. Users are 
responsible for its correct application  
© UNBS 2021   
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Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 2274:202 3 
© UNBS 202 3 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ..........................  ivv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  2 
4.1 Permeability to Water  ................................ ................................ ................................ ............................  2 
4.2 Setting Time  ................................ ................................ ................................ ................................ ...........  2 
4.3 Compressive –Strength  ................................ ................................ ................................ ........................  2 
4.4 Chloride Content  ................................ ................................ ................................ ................................ ... 2 
5 Sampling  ................................ ................................ ................................ ................................ ................  2 
5.1 Lot ................................ ................................ ................................ ................................ ...........................  2 
5.2 Samples  ................................ ................................ ................................ ................................ ..................  2 
5.3 Criteria for Conformity  ................................ ................................ ................................ ..........................  3 
6 Packaging  ................................ ................................ ................................ ................................ ...............  3 
7 Marking  ................................ ................................ ................................ ................................ ...................  3 
Annex  A (normative)  Test method for determination of permeability to water of c ement mortars 
with and without addition of integral waterproofing compound  ................................ ......................  4 
A.1 General  ................................ ................................ ................................ ................................ ...................  4 
A.2 Testing equipment  ................................ ................................ ................................ ................................ . 4 
A.2.1  Permeability Unit  ................................ ................................ ................................ ................................ ... 4 
A.2.2  Rammer  ................................ ................................ ................................ ................................ ..................  4 
A-3 Standard sand  ................................ ................................ ................................ ................................ ........  4 
A.3.1  Regraded Sand  ................................ ................................ ................................ ................................ ...... 4 
A.4 Preparation of mortar  ................................ ................................ ................................ ............................  5 
A.5 Preparation of specimen  ................................ ................................ ................................ ......................  5 
A.6 Curing and storage of specimen  ................................ ................................ ................................ .........  5 
A.7 Procedure of test  ................................ ................................ ................................ ................................ ... 6 
A.8 Faulty specimen and retests  ................................ ................................ ................................ ................  6 
Bibliography  ................................ ................................ ................................ ................................ ........................  8 
 DUS 2274 : 2023 
iv © UNBS 2021 – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimen tarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliber ate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to sta keholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Tec hnical Committee UNBS /TC ###, [name of committee] , 
Subcommittee SC ##, [name of subcommittee] . 
This second/third/… edition cancels and replaces the first/second/… edition ( US nnn-n:yyyy), which has been 
technically revised.  
US nnn consists of the followin g parts, under the general title Introductory element — Main element :  
 DUS 2274:202 3 
© UNBS 202 3 – All rights reserved  v 
  
 DRAFT UGANDA STANDARD  DUS 2274: 2023  
 
© UNBS 2021 – All rights reserved  1 
 Integral waterproofing compounds for cement mortar and 
concrete — specification  
1 Scope   
This standard cover s the requirements for integral waterproofing compounds for cement mort ar and  conc rete   
Note s 
1 Integral waterproofing compounds for mortar and concrete shall be used in such proportions as recommended 
by manufacturer but not exceeding 3 percent by weight of cement   
2 For the purpose of  all the requirements  in this standard,  ceme nt shall mean Portland cement 3 2.5 Grade, 4 2.5 
grade or 5 2.5 Grade conforming to US EAS 18 -1. By agreement between  the purchaser  and the supplier,  testing of 
waterproofing compou nds may  be done with  Portland slag cement conforming to US EAS 18 -1 or Portland Pozzolan a 
cement - Fly ash based conforming to  US EAS 18 -1 or Portland pozzolana cement - Calcined  clay based conforming to US 
EAS 18 -1. And masonry cement grade  22.5 conforming to US 366  part 1 & 2 . 
2 Normative references   
The following referenced documents referred to in the text in such a way that some  or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
US EAS 18 -1, Cement — Part 1 : Composition, specification and conformity criteria for common cements   
US 306,  Specification for standard sand for use in the testing of cement   
US EAS 148 -3, Cement — Test methods — Part 3: Determination of setting times and soundness  
US EAS 148 -1, Ceme nt — Test methods — Part 1: Determination of strength  
US EAS 184 -2, Cement — Test methods — Part 2: Chemical analysis  
US 366 -1, Masonry cement - Part 1: Specification  
US 366 -2, Masonry cement - Part 2: Test methods  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminologica l databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp   
2 © UNBS 2023  – All rights rese rved 
 4 Requirements   
4.1 Permeability to Water  
The permeability to water of the standard cylindrical specimen prepared with t he recommended proportions of 
waterproofing compound shall be less than half of the permeability of similar specimen prepared without the 
addition of the compound when tested in accordance with the method .given in Annex A. 
4.2 Setting Time  
The setting tim e of the cement admixed with the recommended proportion of the waterproofing compound 
when tested according .to US EAS 148 -3, keeping time of gauging not less than 5 min nor more than 6 min 
shall conform to the following requirements :  
a) Initial setting time  — Not less than 30 min nor the reduction in the initial setting time shall be more 
than 25 percent of the actual initial setting time of cement used for testing.  
b) Final setting time — Not more than 600 min nor the increase in t he final setting time shalI b e more 
than 25 percent of the actual final setting time of cement used for testing.  
4.3 Compressive –Strength  
The average compressive strength of 3 mortar cubes, prepared, stored and tested in accordance with the 
method described in US EAS 148 -1, using the  recommended proportion of integral waterproofing compound 
as admixture to the cement shall be as follows:  
a) Compressive strength at 3 days (72  1 h) – Not less than the minimum specified 3 days compressive 
strength of the grade of ordinary Portland cement used nor less than 90 percent of the 3 days 
compressive strength of mortar cubes prepared with same cement and sand only.  
b) Compressive strength at 7 days (168  2 h) – Not less the minimum specified 7 days compressive 
strength of the grade of ordinary Port land cement used nor less than 90 percent of the 7 days 
compressive strength of mortar cubes prepared with same cement and sand only.  
4.4 Chloride Content  
The chloride content determined in accordance with US EAS 184 -2 in the product shall be declared by the 
manufacturer. Further, it should not exceed 2.0 percent by mass of the product.  
5 Sampling  
5.1 Lot  
Waterproofing compound up  to 500 kg/500 Iitre or part manufactured at a time with same raw material shall 
constitute a lot.  
5.2 Samples  
Representative samples of waterproofing compound shall be selected in the manner specified in 4.2.1.  
5.2.1 The number of containers/bags of a particular lot shall be selected for sampling in such a manner that 
complete representation is assured. The number of containers/ bags to be sample shall be in accordance  with 
Table 1. DUS  2274: 202 3 
© UNBS 2023 – All rights reserved  3 
 5.2.2 Each sample for testing requirements as per 4.1 to 4.4 shall be the composite sample of the  individual 
samples taken from the lot as per Table 1.  
Table1  sampling plan  
SI No.  No. of Containers/  
bags in the Lot  No. of Containers/ 
Bags  to be sampled  
i.  Up to 25 2 
ii.  26 to 50  3 
iii.  51 to 100  5 
iv.  101 to 300  7 
v.  301 to 500  10 
5.3 Criteria for Conformity  
A lot shall be considered as conforming to the requirements of this standard if the composite sample mee t the 
requirements mentioned in 4.1 to 4.4. 
6 Packaging  
The integral waterproofing compound for cement mortar and concrete shall be packed in suitable 
containers/bags.  
7 Marking  
Each container/bag shall be legibly and indelibly marked with the following:  
a) Name of the material;  
b) Name and address of the manufacturer and/or his trade -mark, if any;  
c) Net mass;  
d) Brand name, if any;  
e) Date, month and year of manufacture;  
f) Batch No./Control unit No.  
g) Maximum chloride content;  
h) Manufacturer’s recommended dosage;  
i) Instructions  for use and safety precautions;  
j) Recommended storage conditions, and  
k) Date of expiry.  
  
4 © UNBS 2023  – All rights rese rved 
 Annex  A 
(normative)  
 
Test method for determination of permeability to water of cement 
mortars with and without addition of integral  waterproofing compound  
A.1 General  
This method of test covers the procedure for determining the permeability to water of the cement sand mortar 
specimen, prepared with and without the addition of the waterproofing compound and cured under specified 
conditions, by measuring the percolation of water through standard cylindrical specimen.  
A.2 Testing equipment  
A.2.1 Permeability Unit  
The permeability unit shall consist of a specimen container ring of 100 mm diameter and 50 mm height held 
between a bottom plate and a water cell. The hydraulic hea d for testing shall be obtained by connecting the 
unit to a, compressor through a water pressure vessel. A pressure regulator and a pressure gauge shall be 
included between the compressor and water pressure vessel to indicate the test pressure. Water perco lating 
through the specimen shall be collected in a container Fig. 1 and Fig. 2 give the details of an individual unit.  
The water cell shall be a 100 mm diameter brass cylinder and the top and bottom plates shall be either of 
brass or any other non -corrodi ng metal. The connecting pipeline from the water cell to the water pressure 
vessel shall also be of non -corroding metal or of hard polythene. This requirement is necessary since the tests 
last over a number of days in which mild steel or allied materials w ill corrode and the rust formed will coat the 
top of the specimen and affect the permeability. The connection of units to the compressor shall be done by 
means of armoured heavy duty rubber hose.  
The water pressure vessel shall be made of galvanized steel and capable of withstanding the applied 
pressure with an adequate margin of safety.  
A.2.2 Rammer   
A standard rammer of the type shown in Fig. 3 shall be used to compact the mortar. The rammer shall consist 
of a plunger weighing 500 + 5 g which shall fall f reely through a height of 150 + 1 mm in a tubular guide. The 
base of the plunger shall have a diameter of 50 + 1 mm.  
A-3 Standard sand  
A.3.1 Regraded Sand  
The standard sand to be used in the preparation of the mortar shall be natural, preferably rounded s iliceous 
sand with a maximum amount of quartz grains. The sand should preferably be the same as standard and 
conforming to US 306  but clean, separated and recombined to yield the following gradation:  
Sieve Designation  Cumulative Retained Percent  
2.00 mm  0 DUS  2274: 202 3 
© UNBS 2023 – All rights reserved  5 
 1.70 mm  5  5 
1.00 mm  33  5 
500 microns  67  5 
150 microns  88  5 
75 microns  98  2 
A.4 Preparation of mortar  
B.4.1 Clean appliances shall be used for mixing and the temperature of the water and that of the test room 
at the time when the above ope rations are being performed shall be 27  2°C. 
A.4.2 The quantities of cement and standard sand required for ea ch specimen shall be as follows : 
a) Cement      :140 g  
b) Waterproofing compound  : As recommended by manufacturer  
c) Standard sand    :700 g  
The amoun t of water used for gauging shall be equal to produce a flow of 75  5 percent.  
The mixture of cement and standard sand shall be placed on a non -porous plate. It shall be mixed dry with a 
trawel for 1 min and then with water until the mixture is of uniform  colour. The quantity of water to be used 
shall be as specified in 4.2. The time of mixing shall be not less than 3 min and should the time taken to obt ain 
a uniform colour exceed 4 m in, the mixture -shall be rejected and the operation repeated with a fresh  quantity 
of cement, sand and water.  
NOTE  Wherever possible, mixing with Hobart type mortar mixer is recommended. In such cases, it is desirable to 
take a batch of 300 g cement and 1500 g regraded sand since in the Hobart mixe r efficiency is better with a 1800 g -2000 
g hatch. The material used for the flow test can be collected back into the bowl, mixed again for 15 s at medium speed and 
used for casting. In case where flow test is omitted after completion of mixing, allow the mortar to stand for 90s, remi x for 
15 s at medium speed and later mould two test specimen.  
A.5 Preparation of specimen  
The container ring shall be given a thin coating of neat cement slurry and the mortar shall be placed in  it in two 
layers. Each layer shall be compacted with 10 blow s of the standard rammer. During compaction the guide of 
the rammer shall remain in contact with the wall of the container ring. It shall be moved through a uniform 
distance after each blow so as to cover the entire periphery container ring a fter 10 blows.  
After compaction the top specimen shall be Ievelled off with a 12 mm diameter rod slowly and firmly moved 
over the surface. No trowelling  of other type of the finish shall be allowed.  
A.6 Curing and storage of specimen  
Keep the container ring with the sp ecimen at a temperature of 27  2°C in an atmosphere of at least 90 
percent relative humidity for 24 h. At the end of that period submerge the specimen in clean fresh water and 
keep there for 20 days, and take it out just prior to testing. The water in whi ch the specimens are submerged 
shall be changed every 7 days and shall be maintained at a temperature of 27  2°C.  
6 © UNBS 2023  – All rights rese rved 
 A.7 Procedure of test  
The specimen shall be lightly wire brushed on either faces to remove Laitance , surface tines, etc and washed.  
Later ea ch of the specimen shall be fitted into the permeability ceil as shown in Fig. 2.  
An initial pressure of about 0.05 N/mm2 shall be applied to the water and from time to time the collecting 
container shall -be taken out and weighed to determine the rate of percolation. The rate of percolation will be 
comparatively high in the initial stages and will then become stabilized. At this stage the pressure shall be 
increased again by 0.05 N/mm2 and this procedure repeated until a final pressure of 0.2 N/mm2 is reac hed. 
When a stable flow has been reached at this pressure, readings of the percolation shall be taken at fixed 
intervals of time for 8 h.  
The test shall be carried out at a temperature at 27   2°C. For each test three specimen shall be tested 
without the u se of waterproofing compound, and three with the use of the waterproofing compound in the 
recommended proportions. If the average percolation (measured in millilitres of water) for the specimen 
incorporating the waterproofing compound is less than 50 perce nt of the average percolation in the case of the 
specimen without the -waterproofing compound; the integral waterproofing compound under test shall be 
considered satisfactory.  
A.8 Faulty specimen and retests  
Specimen that are manifestly faulty or that giv e percolations (measured in millilitres of water) differing by more 
than 20 percent from the average shall not be considered. In such cases, the average of the remaining two 
specimen can be considered provided the two values agree within 10 percent of -their average; otherwise a 
retest shall be made.  
 
Fig. 1  General arrangement of permeability test unit  DUS  2274: 202 3 
© UNBS 2023 – All rights reserved  7 
 
 
Fig. 2  Detail of permeability unit  
 
Fig. 3  Specimencompacting apparatus  (guide  and rammer )  
8 © UNBS 2023  – All rights rese rved 
 Bibliography  
[1] IS 2645:2003 , Integral waterproofing compou nds for cement mortar and concrete — specification  
 
 DUS  2274: 2023  
© UNBS 2021 – All rights reserved  9 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certifica tion Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Ugand a Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Sta ndards.  
 
 DUS 2274: 202 3   
 
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Price based on nn pages  
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