Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Epoxy and Cementitious Anchoring Grouts
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# Environmental and Service Conditions {toc}
−## Product selection shall match the temperature class and exposure of the actual installation; a single "epoxy" specification that ignores ambient and substrate temperature, moisture, and chemical exposure is the most common source of bond failure and field RFIs. {note}
+## Product selection shall match the temperature class and exposure of the actual installation; a single "epoxy" specification that ignores ambient and substrate temperature, moisture, and chemical exposure is the most common source of bond failure and field RFIs.
## ASTM C881 assigns an installation-temperature class to each epoxy: Class A below 40°F, Class B from 40°F to 60°F, and Class C above 60°F. The class must match the substrate and ambient temperature at the time of installation, not the design service temperature. A Class C product placed on a 35°F winter or below-grade surface cures incompletely and never reaches its rated bond. {note}
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### Adhesive anchoring systems shall be two-component epoxy resin systems conforming to ASTM C881 Type IV or Type V (load-bearing) for concrete substrates, or AASHTO M235 for DOT bridge and infrastructure work.
−## ASTM C881 Types IV and V are the load-bearing classes; Types I through III and VI through VII are non-structural bonding or sealing grades and are not used for structural anchorage. AASHTO M235 is the highway-bridge analog required on DOT work. {note}
−
```datasheet
label: Adhesive Material Standard
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```
+## ASTM C881 Types IV and V are the load-bearing classes; Types I through III and VI through VII are non-structural bonding or sealing grades and are not used for structural anchorage. AASHTO M235 is the highway-bridge analog required on DOT work. {note}
+
## Viscosity Grade {toc}
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## Adhesive Dispensing and Setting {toc}
−## Two-component adhesive must be mixed to a uniform color through the static mixing nozzle before it enters the hole, and the first portion dispensed from a fresh cartridge is discarded because it is unmixed. The hole is filled from the bottom up to avoid trapping air, and the anchor is inserted with a slow twisting motion within the product gel time. Once the gel time passes, the anchor shall not be disturbed until full cure. {note}
+## Two-component adhesive must be mixed to a uniform color through the static mixing nozzle before it enters the hole, and the first portion dispensed from a fresh cartridge is discarded because it is unmixed. The hole is filled from the bottom up to avoid trapping air, and the anchor is inserted with a slow twisting motion within the product gel time. Once the gel time passes, the anchor shall not be disturbed until full cure.
### The initial unmixed adhesive from each new cartridge or mixing nozzle shall be discarded until the dispensed material is a uniform color.
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default: 2
```