Langrui LR-P40 Operating Instructions

LR-P40 Pull-off Tester

Operating Instructions

JINAN LANGRUI DETECTION TECHNOLOGY CO. ,LTD.

1

PREFACE

Your choice of the products made by Jinan Langrui Detection Technology Co.,

Ltd.( LANGRY) is greatly appreciated. We are committed to deliver you excellent

products and satisfied sales services. Please carefully read the instructions prior to

use.

1. The instructions are prepared to provide the correct and complete descriptions of

related products and data. However, we do not guarantee that there are no errors or

omissions. Therefore, we will not bear responsibilities for any resulting

consequences.

2. LANGRY keeps the right of updating the instructions without prior notice.

3. LANGRY bears no responsibilities for possible losses from data deviation or

incorrect testing conclusion arising from instrument failure and other errors.

4. When the instrument is put into operation, it means that you have carefully read

and had full picture of all terms in the instructions, and you have fully agreed to all the

terms in the instructions.

5. LANGRY will not bear responsibilities for all the signed agreements violating the

statement during the sales and services process not involving LANGRY.

2

Testing Standard

EN 1542-1999

Products and systems for the protection and repair of concrete structures - Test

methods - Measurement of bond strength by pull-off;

EN 1015-12

Determination of adhesive strength of hardened rendering and plastering mortars on

substrates;

EN 1348

Adhesives for tiles - determination of tensile adhesion strength for cementitious

adhesives

BS 1881-207

Testing concrete- Recommendations for the assessment of concrete strength by

near-to-surface tests

ASTM D 4541

Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion

Testers

ASTM C 1583

Standard Test Method for Tensile Strength of Concrete Surfaces and the Bond

Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct

Tension (Pull-off Method)

ASTM D 7234-05

Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using

Portable Pull-Off Adhesion Testers

ASTM D 7522

Standard Test Method for Pull-Off strength of Fiber reinforced Plastics Bonded to

Concrete Substrates

JGJ110 Testing standard for adhesive strength of tapestry brick of construction

engineering

JGJ126 Specification for construction and acceptance of tapestry brick work for

exterior wall

JGJ144 Technical standard for external thermal insulation on walls

3

1. Uses and Features

LR-P40 Pull-off Tester is used to test the bonding strength of building face brick and

mosaics with walls or floors.

This instrument is a small hydraulic force measuring device. When testing the

bonding strength of facing brick, it produces tension on the bonding material of facing

brick through three-point counterforce support. When testing concrete, it USES the

principle of post-install pull-out method and calculates the concrete strength by

measuring the force needed to pull out and anchor solid inside concrete.The

instrument is composed of perforating jack, hand pump, triangular chassis, force

measuring device and other components. It has a one camera dual use, novel

structure, small size, convenient operation and complete functions.

The oil pump of the tester is loaded manually, and the rocker lead screw does not

need to be shaken out in advance. It has the characteristics of small driving torque,

comfortable and reasonable swing direction and continuous and uniform loading.

Using single chip microcomputer as the core intelligent data processor, the battery

inside the machine can be charged,

It has the functions of full digital display, automatic zero clearing (it can eliminate the

measurement error caused by the friction force in the hydraulic system), peak holding

selection, storing 500 pieces of data and over range display.

2.Technical parameters

The maximum pulling force of detector is 40 kn

Chassis fulcrum inner diameter 120mm

The resolution of digital display is 0.01kN

Indication error ≤± 1% F.S

Weight (host) 4.3 kg