GB/T 1346-2024 PDF English
US$290.00 · In stock · Download in 9 secondsGB/T 1346-2024: Test methods for water requirement of standard consistency, setting time and soundness of the Portland cement Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 1346: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1346-2024 | English | 290 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Test methods for water requirement of standard consistency, setting time and soundness of the Portland cement
| Valid |
| GB/T 1346-2011 | English | 85 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Test methods for water requirement of normal consistency, setting time and soundness of the Portland cement
| Valid |
| GB/T 1346-2001 | English | 359 |
Add to Cart
|
3 days
|
Test methods for water requirement of normal consistency, setting time and soundness of the Portland cements
| Obsolete |
| GB/T 1346-1989 | English | 279 |
Add to Cart
|
3 days
|
Standard test method--Water requirement for normal consistency, setting time and soundness of the portland cement
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 1346-2024
GB/T 1346-2024: Test methods for water requirement of standard consistency, setting time and soundness of the Portland cement
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1346-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.100.10
CCS Q 11
Replacing GB/T 1346-2011
Test Methods for Water Requirement of Standard
Consistency, Setting Time and Soundness of the Portland
Cement
Issued on: DECEMBER 31, 2024
Implemented on: JULY 1, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 6
4 Principle... 7
5 Instruments and Equipment... 7
6 Test Water... 12
7 Test Conditions... 12
8 Determination Method for Water Requirement of Standard Consistency - Test Rod
Method (reference method)... 13
9 Determination Method for Water Requirement of Standard Consistency - Test Cone
Method (substitute method)... 14
10 Determination Method for Setting Time... 15
11 Determination Method for Soundness - Le Chatelier Method (reference method) 16
12 Determination Method for Soundness - Test Cake Method (substitute method)... 17
13 Inspection Report... 18
Test Methods for Water Requirement of Standard
Consistency, Setting Time and Soundness of the Portland
Cement
1 Scope
This document specifies the principles, instruments and equipment, test water, test conditions
and determination methods for the water requirement of standard consistency, setting time and
the inspection method for volume soundness mainly caused by free calcium oxide.
This document is applicable to the water requirement of standard consistency, setting time and
soundness inspection of general-purpose Portland cement.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GSB 14-1510 Cement Standard Samples for Strength Test
JC/T 727 Apparatus for Determining Normal Consistency and Setting Time of Cement Paste
JC/T 729 Mixer for Cement Paste
JC/T 954 Le Chatelier for Determining Soundness of Cement Paste
JC/T 955 Boiling Box for Determining Soundness of Cement
JC/T 962 Tester for Determining Expansion of Le Chatelier Needles
3 Terms and Definitions
3.1 water requirement of standard consistency
When neat cement paste reaches the standard consistency state, the percentage of water used
for mixing the neat paste as a percentage of cement mass.
3.2 setting time
When the cement paste reaches the standard consistency condition, the time required from the
addition of cement to the sinking of the test needle into the paste to a certain depth.
NOTE. it includes initial setting time and final setting time.
3.3 soundness
The capability of neat cement paste to maintain a stable volume after hardening.
NOTE. it is characterized by the Le Chatelier method or the test cake method.
4 Principle
4.1 Standard Consistency of Cement
The neat cement paste with the standard consistency has a certain resistance to the sinking of
the standard test rod (or test cone). When a metal test rod (test rod method) or test cone (test
cone method) is used to sink into neat cement pastes with different water contents, and the test
rod or test cone can stay in the specified equilibrium position, the water content is the water
requirement of standard consistency, and the neat paste is the standard consistency cement paste.
4.2 Boiling Soundness
4.2.1 Le Chatelier method
The relative displacement of the test needle after boiling the neat cement paste with standard
consistency in the Le Chatelier is determined to characterize the degree of volume expansion.
4.2.2 Test cake method
The change state of the test cakes of neat cement paste with standard consistency after boiling
is observed to characterize the volume soundness.
5 Instruments and Equipment
5.1 Cement Paste Mixer
Meet the requirements of JC/T 729.
5.2 Neat Cement Paste Standard Consistency and Setting Time Tester
5.2.1 Cement standard consistency and setting time tester
The cement standard consistency and setting time tester is also called “Vicat apparatus”, which
shall meet the requirements of JC/T 727.The total mass of the sliding part is 300 g 1 g. The
surface of the sliding rod connected to the test rod and the test needle shall be smooth and can
fall freely by gravity. There shall be no tightness or looseness, as shown in Figure 1a) and Figure
8 Determination Method for Water Requirement of Standard
Consistency - Test Rod Method (reference method)
8.1 Preparation before the Test
8.1.1 The sliding rod of the Vicat apparatus can freely slide. Wipe the test mold and the glass
bottom plate with a wet cloth and place the test mold on the glass bottom plate.
8.1.2 Make adjustments, so that the pointer points at the reference point when the test rod
contacts the glass plate.
8.1.3 The mixer normally operates.
8.2 Mixing of Neat Cement Paste
Use neat cement paste mixer for mixing. First, use a wet cloth to wipe the mixing pot and
mixing blades. Measure-take or weigh-take a certain amount of mixing water, accurate to 0.5
mL or 0.5 g, and pour it into the mixing pot. Then, within 5 s ~ 10 s, carefully add the weighed
500g 1 g of cement into the water, and prevent water and cement from splashing out. When
mixing, first place the pot on the pot base of the mixer, raise it to the mixing position, start the
mixer, stir at a low speed for 120 s, stop for 15 s; when stopping mixing, scrape the cement
paste on the blades and pot wall into the middle of the pot, and then, stir at a high speed for 120
s and stop.
8.3 Determination Steps of Water Requirement of Standard Consistency
After mixing is completed, immediately take an appropriate amount of neat cement paste and
put it into the test mold placed on the glass bottom plate at one time. Use a straight-edge knife
with a width of about 25 mm to cut a circle between the neat paste and the inner wall of the test
mold, then, lift the glass plate and gently vibrate it on the rubber pad for no more than 5 times.
Avoid water seepage during vibration. Then, at about 2/3 of the upper surface of the test mold,
slightly tilt it to the test mold surface; respectively and gently saw off the excess neat paste
outwards, and then, from the edge of the test mold perpendicular to the saw direction, gently
wipe the top of the test mold once. During the operation of sawing off the excess neat paste and
screeding, the neat paste shall not be compacted. After screeding, quickly move the test mold
and the glass bottom plate to the base of the Vicat apparatus, so that the test rod is located in
the center of the test mold surface. Lower the test rod, until it contacts the surface of the neat
cement paste, tighten the screws for 1 s ~ 2 s, and then, suddenly release it to allow the test rod
to vertically and freely sink into the neat cement paste.
When the test rod stops sinking or when the test cone is released for 30 s, record the distance
between the test rod and the bottom plate. After raising the test rod, immediately wipe it clean.
The entire operation shall be completed within 1 minute after mixing. The neat paste with the
standard consistency is when the test rod sinks into the neat paste and is 6 mm 1 mm away
from the glass bottom plate. The percentage of mixing water to cement mass is the water
requirement of standard consistency (P) of the cement.
9 Determination Method for Water Requirement of Standard
Consistency - Test Cone Method (substitute method)
9.1 Preparation before the Test
9.1.1 The metal rod of the Vicat apparatus can freely slide.
9.1.2 Make adjustments, so that the pointer points at the zero point when the test cone contacts
the top surface of the cone mold.
9.1.3 The mixer normally operates.
9.2 Mixing of Neat Cement Paste
In accordance with 8.2, mix the neat cement paste.
9.3 Determination of Standard Consistency
9.3.1 The water requirement of standard consistency of cement can be determined by the
substitute method using either the adjusted water amount method or the unchanged water
amount method. When the adjusted water amount method is used, the mixing water amount is
determined by experience, and when the unchanged water amount method is used, the mixing
water amount is 142.5 mL.
9.3.2 After the mixing is completed, immediately put the mixed neat cement paste into the cone
mold, use a table knife to gently poke the surface of the paste for 5 times, and then, gently
vibrate it on the rubber pad for 5 times and scrape off the excess neat paste; after screeding,
quickly put it in a fixed position under the test cone, lower the test cone to the surface of the
neat paste, tighten the screw for 1 s ~ 2 s, and suddenly release it to let the test cone vertically
and freely sink into the neat cement paste. When the test cone stops sinking or when the test
cone is released for 30 s, record the sinking depth of the test cone. The entire operation shall be
completed within 1 min after mixing.
9.3.3 When the adjusted water amount method is used for determination, the neat paste when
the test cone sinks to a depth of 30 mm 1 mm is the neat paste with the standard consistency.
The mixing water volume is the water requirement of standard consistency of the cement, which
is calculated as a percentage of the cement mass. If the sinking depth exceeds the range, another
specimen needs to be weighed, the water volume adjusted, and the test repeated, until it reaches
30 mm 1 mm.
9.3.4 When the unchanged water amount method is used for determination, the water
requirement of standard consistency is calculated in accordance with the empirical formula (1)
or the corresponding scale on the instrument. When the sinking depth of the test cone is less
diameter end facing upward and the small end facing downward, place it on the glass plate, and
then, put it in the moisture curing box for further curing. Use the final setting needle [see Figure
1e)] for determination. When the final setting time is approaching, carry out the determination
once every 15 minutes (or shorter). During each determination, the test needle shall not fall into
the original needle hole. When the final setting needle sinks into the test body by 0.5 mm, that
is, the ring fitting begins to leave no trace on the test body and the initial setting needle sinks to
a depth of no more than 1 mm on the small diameter end face of the test body, the cement
reaches the final setting state. When the neat paste reaches the final setting, the determination
shall be immediately repeated. Only when the results reach the final setting state twice can it
be determined that the neat paste is the final setting at this time.
10.5 Determination Precautions
During the determination, pay attention to.
a) During the initial determination, the metal column shall be gently supported to allow
it to slowly descend to prevent the test needle from bending by collision, but the result
is based on free fall;
b) After each test is completed, the test needle shall be wiped clean and the test mold
shall be brought back to the moisture curing box. During the entire test process, the
test mold shall be prevented from vibration;
c) When the neat cement paste has abnormal setting, the water requirement of standard
consistency and setting time can still be determined in accordance with the operating
steps specified in this document, and this shall be indicated in the report.
11 Determination Method for Soundness - Le Chatelier
Method (reference method)
11.1 Preparation before the Test
Each specimen needs to be formed into two test pieces, and each Le Chatelier needs to be
equipped with two glass plates with a side length or diameter of about 80 mm, a thickness of 4
mm ~ 5 mm, and a mass of about 75 g. All glass plates in contact with the neat cement paste
and the inner surface of the Le Chatelier shall be coated with a thin layer of mineral oil.
11.2 Forming and Curing of Le Chatelier Test Pieces
11.2.1 Place the prepared Le Chatelier on the glass plate and immediately fill the Le Chatelier
with the prepared standard consistency neat paste at one time. When filling the neat paste, it is
advisable to use the Le Chatelier fixing device or use one hand to gently support the Le Chatelier,
and the other hand to use a knife to gently poke the surface of the paste for 3 times, and then,
perform screeding.
11.2.2 Cover the glass plate and move the test pieces to the moisture curing box for curing.
11.2.3 During the moisture curing period, if the Le Chatelier test pieces are observed to be
abnormal, terminate the test, and the cement soundness is judged to be disqualified.
11.3 Boiling
11.3.1 Adjust the water level in the boiling box. During the entire boiling process, the water
level is always higher than the test piece.
11.3.2 After 24 h 2 h from the time of adding water to cement, remove the glass plate of the
Le Chatelier test pieces, and first, use the Le Chatelier expansion tester to measure the distance
between the Le Chatelier pointer tips (A) with an accuracy of 0.5 mm.
11.3.3 Place the test pieces on the test piece rack in the water of the boiling box, with the pointer
facing upward, then, within 30 min 5 min, heat to boiling, and keep boiling for 180 min 5
min.
11.3.4 After boiling is completely, immediately drain the hot water in the boiling box, open the
box cover, wait for the box to cool to room temperature, and take out the test pieces. Use the
Le Chatelier expansion tester to measure the distance between the Le Chatelier pointer tips after
boiling (C) with an accuracy of 0.5 mm.
11.4 Determination of Boiling Soundness
Take the average value of the increased distance (C A) between the pointer tips of the two test
pieces after boiling for result determination. The average value is rounded to one decimal place.
When the average value is not greater than 5.0 mm, and the difference in the increased distance
between the pointer tips of the two test pieces is less than 3.0 mm, the cement soundness is
determined to be qualified. Otherwise, the same sample shall be immediately subject to a
repeated test by the Le Chatelier method and the test cake method. If the result of any method
is disqualified, the cement soundness is determined to be disqualified.
12 Determination Method for Soundness - Test Cake Method
(substitute method)
12.1 Preparation before the Test
Two glass plates with a side length of about 100 mm are required for each sample. All glass
plates in contact with the neat cement paste shall be lightly coated with a layer of mineral oil.
12.2 Forming and Curing of Test Cakes
Take out a part of the prepared standard consistency neat paste and divide it into two equal parts,
make them into balls, put them on the prepared glass plate, gently vibrate the glass plate and
use a knife wiped with a wet cloth to wipe it from the edge to the center to make test cakes with
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 1346-2024 be delivered?Answer: The full copy PDF of English version of GB/T 1346-2024 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 1346-2024_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 1346-2024_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 1346-2024 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 1346-2024?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1346-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 1346-2024?A step-by-step guide to download PDF of GB/T 1346-2024_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 1346-2024".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|