This standard delineates the specifications for equipment utilized in gauging the water retention capacity of masonry cement, ensuring uniformity and accuracy in testing. It serves as a critical reference for manufacturers, testing labs, and quality assurance professionals by detailing the construction, materials, and assembly requirements for the apparatus involved in water retentivity evaluation.
Overview
This standard delineates the specifications for equipment utilized in gauging the water retention capacity of masonry cement, ensuring uniformity and accuracy in testing. It serves as a critical reference for manufacturers, testing labs, and quality assurance professionals by detailing the construction, materials, and assembly requirements for the apparatus involved in water retentivity evaluation.
Audience
Contents
Structure
Scope: Defines apparatus and material requirements for assessing hydraulic and pozzolanic cement water retention.
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or mortar-resistant |
| Funnel | Brass (plated) or mortar-resistant |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 or Whatman |
graph TD
A[Perforated Dish] --> B[Funnel]
B --> C[Flask]
C --> D[Filter Paper]
A --> E[Three-way Stopcock]
E --> F[Pressure Control Device]
F --> G[Mercury Manometer]
This section ensures standardized apparatus and materials for reliable water retention testing.
Materials for Apparatus Components (Clause 2.1, Table 1)
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or corrosion-resistant material |
| Funnel | Brass (plated) or corrosion-resistant material |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 or Whatman |
graph TD
A[Apparatus Components] --> B[Perforated Dish]
A --> C[Funnel]
A --> D[Flask]
A --> E[Filter Paper]
B --> F[Brass (plated) or resistant material]
C --> F
D --> G[Glass]
E --> H[Carl Schleicher/Whatman equivalent]
Ensures compatibility and durability of materials for accurate water retentivity testing.
Construction Details and Material Specifications (Clause 3 & Fig. 1)
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or mortar-resistant material |
| Funnel | Brass (plated) or mortar-resistant material |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 or Whatman |
graph LR
A[Perforated Dish] --> B[Filter Paper (150 mm diameter)]
B --> C[Funnel]
C --> D[Three-way Stopcock]
D --> E[Pressure Control Device]
E --> F[Mercury Manometer]
Ensures accurate flow and measurement for water retention testing.
Component Marking Requirements:
ISI Certification Mark (Clause 4.1.1):
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or mortar-resistant material |
| Funnel | Brass (plated) or mortar-resistant material |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 or Whatman |
flowchart LR
A[Manufacturing] --> B[Component Marking]
B --> C{Marking Details}
C -->|Manufacturer Name| D[Permanent Mark]
C -->|Date of Manufacture| D
D --> E[No Impact on Performance]
E --> F[Optional ISI Certification Mark]
F --> G[Quality Control & Inspection]
G --> H[License and Ongoing Surveillance]
For more information on licensing, refer to the Indian Standards Institution.
Core Materials and Related Standards
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or corrosion-resistant material |
| Funnel | Brass (plated) or corrosion-resistant material |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 or Whatman |
graph LR
A[Perforated Dish] --> B[Filter Paper (150 mm)]
B --> C[Glass Flask]
A --> D[Brass Plated Funnel]
C --> E[Pressure Control Device]
E --> F[Mercury Manometer]
E --> G[Three-way Stopcock]
This section consolidates essential materials, related standards, and apparatus details for water retention testing.
Frequently Asked
Per IS 10850, the apparatus components should be made from materials resistant to masonry mortar effects. Specifically:
| Component | Material |
|---|---|
| Perforated Dish | Brass (plated) or other mortar-resistant material |
| Funnel | Brass (plated) or other mortar-resistant material |
| Flask | Glass |
| Filter Paper | Equivalent to Carl Schleicher No. 50 Schuell No. 576 or Whatman |
This ensures the apparatus' durability and accurate measurement of water retention in masonry cement.
Vacuum control as per IS 10850 Clause 3.1 involves:
This system facilitates precise vacuum application essential for reliable water retention measurement.
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The apparatus as defined by IS 10850 includes:
This configuration ensures controlled vacuum application for accurate water retention assessment.
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IS 10850 specifies the apparatus requirements for measuring water retentivity of masonry cement, while IS 4031-1968 details the physical test methods for hydraulic cement. IS 10850 references IS 4031-1968 for standardized testing procedures, including use of accessories such as the tamping bar. Together, they ensure that equipment and test methods are compatible and yield accurate, reproducible results for cement water retention.
Under IS 10850 Clause 4.1.1, the ISI Certification Mark is optional, not compulsory. While the manufacturer’s name and manufacturing date must be indelibly marked on apparatus components, use of the ISI mark requires a license from the Indian Standards Institution and signifies compliance through ongoing inspection and quality assurance. Manufacturers may choose to display the ISI mark if licensed, but it is not a mandatory requirement.
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