BS EN 14227-11:2006 – Hydraulically bound mixtures — Specifications — Part 11: Soil treated by lime
1 Scope
This European Standard applies to the treatment with lime of natural soils and other materials for roads, airfields and other trafficked areas and specifies the requirements for their constituents, composition and laboratory performance classification.
Two types of treatment are covered, improvement and stabilization. This European Standard relates only to lime-treated layers for trafficked areas (as opposed to lime columns or piles for example) but can be used for other civil engineering purposes although additional requirements might be necessary to complement or replace those required by this European Standard.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 459-1 , Building lime — Part 1: Definitions, specifications and conformity criteria
EN 459-2, Building lime — Part 2: Test methods
EN 1 3286-2, Unbound and hydraulically bound mixtures — Part 2: Test methods for the determination of the laboratory reference density and water content — Proctor compaction
EN 1 3286-41 , Unbound and hydraulically bound mixtures — Part 41: Test method for the determination of the compressive strength of hydraulically bound mixtures
EN 1 3286-46, Unbound and hydraulically bound mixtures — Part 46: Test method for the determination of the moisture condition value
EN 1 3286-47, Unbound and hydraulically bound mixtures — Part 47: Test method for the determination of theCalifornia bearing ratio, immediate bearing index and linear swelling
EN 1 3286-48, Unbound and hydraulically bound mixtures — Part 48: Test method for the determination of the degree of pulverisation
EN 1 3286-49, Unbound and hydraulically bound mixtures — Part 49: Accelerated swelling test for soil treated by lime and/or hydraulic binder
EN 1 3286-50, Unbound and hydraulically bound mixtures — Part 50: Method for the manufacture of test specimens of hydraulically bound mixtures using Proctor equipment or vibrating table compaction
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
3.1
lime
air lime
3.2
soil
natural, artificial or recycled material or any combination of these
3.3
soil treated by lime
mixture resulting from the addition of lime to a soil in order that it can fulfil its intended purpose NOTE Treatment encompasses both improvement and stabilization.
3.4
soil improved by lime
mixture resulting from the treatment of a soil with lime which improves immediate performance by, for example,either a reduction in moisture content, and/or enhancement of bearing capacity, and/or reduction in plasticity, to enable the soil to provide one or more of the following:
ability to be handled by conventional earthmoving equipment;
ability to be satisfactorily compacted in layers;
ability to be trafficked and provide a working platform for the superimposed layer;
preparation of a soil for the subsequent treatment by slag, fly ash, cement, hydraulic road binder or other product
3.5
soil stabilized by lime
mixture resulting from the treatment of a soil with lime that significantly enhances, generally in the medium to long-term, its mechanical performance and stability, particularly with respect to the action of water and frost
4 Constituents
4.1 Lime
Lime shall be quick lime or hydrated lime.
NOTE Hydrated lime may be used dry or in slurry form.
4.1.1 Quick lime
Quick lime shall conform to EN 459-1 , class CL 90 or CL 80, and the following.
When tested in accordance with EN 459-2, the particle size of the quick lime shall conform to the selected category from Table 1 .
BS EN 14227-11:2006 – Hydraulically bound mixtures — Specifications — Part 11: Soil treated by lime