00743172

Component

https://doi.org/10.3141/1589-04

http://scholar.google.com...vell&publication_year=1997

The grout-like material called flowable fill has experienced new popularity, particularly the controlled low-strength material variety, which is easily excavated. The properties ordinarily desired of the mix are: (a) flow under gravity; (b) hardening for early walkability and cover; and (c) ultimate strength low enough to allow ready excavation. Flowability of fresh material is evaluated in a simple spread test. Hardening is measured by a mortar penetrometer, and these values are correlated with unconfined compressive strength. It is desirable to keep the ultimate strength to less than 1,035 kPa (150 lbf/sq in.); somewhat less target strength is selected for the 28-day value. Mix design is empirical, but the time and expense required may be reduced by following a rational and logical procedure, which is described. The materials emphasized in this paper are Class F coal combustion fly ash and waste sands from greensand ferrous castings.

This paper appears in Transportation Research Record No. 1589, Variable Tire Pressure, Flowable Fill, Dust Control, and Base and Slope Stabilization.

English

p. 26-28

1997

Transportation Research Record

030906161X

Figures (2) ; References (3)

Concrete hardening; Fills; Flowable fill; Fluidity; Fly ash; Hardness; Mix design; Ultimate strength

Flowability

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB, ATRI

Nov 20 1997 12:00AM

• CHEMICAL ADDITIVES FOR DUST CONTROL: WHAT WE HAVE USED AND WHAT WE HAVE LEARNED
• COMPARISON OF ROAD MIX AND PLANT MIX CEMENT-TREATED AGGREGATE BASE COURSE
• DUST CONTROL: AUSTRALASIAN EXPERIENCES WITH VARIOUS CHEMICAL ADDITIVES
• EARTH MATERIALS CATALYST STABILIZATION FOR ROAD BASES, ROAD SHOULDERS, UNPAVED ROADS, AND TRANSPORTATION EARTHWORKS
• EFFECT OF LOWERED TIRE PRESSURES ON ROAD EROSION
• EVALUATING GROUNDWATER POLLUTION SUSCEPTIBILITY OF DUST SUPPRESSANTS AND ROADBED STABILIZERS: CASE STUDY OF A PETROLEUM-BASED PRODUCT
• EVALUATION OF RESILIENT MODULUS FOR LIME- AND CEMENT-STABILIZED SYNTHETIC COHESIVE SOILS
• LET ME SHINGLE YOUR ROADWAY
• PERFORMANCE-BASED TESTING OF CHEMICAL STABILIZERS
• POTENTIAL FACTORS AFFECTING FLOW CONSISTENCY TEST METHOD FOR CONTROLLED LOW-STRENGTH MATERIALS
• REDUCING DAMAGE TO LOW-VOLUME ROADS BY USING TRUCKS WITH REDUCED TIRE PRESSURES
• SASKATCHEWAN HIGHWAYS AND TRANSPORTATION REDUCED TIRE PRESSURE INITIATIVE
• STABILIZATION OF HIGH SOIL AND ROCK CUT SLOPE BY SOIL BIOENGINEERING AND CONVENTIONAL ENGINEERING
• STABILIZATION OF SHALLOW SLOPE FAILURES WITH LIME PILES