Stabiliser materials

Alloy 800 Polythionic acids IG Stabilise material against intergranular corrosion... 

An amber bottle of stabilised material spontaneously exploded. See Chloroacetone... 

The values listed in Table 2 should only be used for qualitative guidance since these can be variations of the c.c.c. with particle size, type and density of surface groupings, time of measurement after adding electrolyte and the presence or absence of stabilising materials such as surfactants. In practice it is advisable to determine the actual value for a particular latex system. 

Stabilisation/solidification processes have been applied both in situ and ex situ, the latter being both on and off site. With an ex situ approach it may be necessary to landfill the stabilised product if an alternative use or disposal option is not possible. A disadvantage here is that the volume of the stabilised product can be considerably greater than the original contaminated material because of the quantities of stabilisation materials that have been added. 

BS 1924, Part 2 Stabilised materials for civil engineering purposes — Methods of test for cement-stabilised and lime-stabilised materials , 1990. 

The useful lifetime of a polyolefin corresponds essentially to the end of the oxidation induction time. In stabilised materials this may be determined either by the time at which the stabiliser has been chemically consumed or that at which it has been lost from the sample by evaporation or extraction. We have developed a model to describe these additive loss processes but it requires a knowledge of the diffusion rates and solubilities of additives in polymer (11, 12). 

An aerobic biological process in which biodegradable (organic) material serves as a source of "food" and energy for microbial growth. The end product is a relatively stabilised material, with a lower organic content, and which may be used beneficially - e.g. as a soil conditioner. 

Sieve size (mm) and other properties Selected granular material Granular material complying with CEN EN 13285 (2010) Cement-stabilised material Lime- or lime and cement-stabiSsed material ... 

The minimum values of CBR or to be achieved after chemical stabilisation should be at least equal to the value that an untreated granular soil material possesses, suitable for subgrade material. An addition of 2.0% cement or 2.5% of lime of total mass in a granular soil material normally gives satisfactory strength and performance of the stabilised material. However, higher than 2.5% of lime may be required to be added when the soil material has a lot of fines and has a high plasticity. 

In all cases in Table 10.3, the number of passes refers to the moisture content at compaction or, in the case of stabilised material, the moisture condition value (MCV) at compaction, determined in the laboratory. 

The HBMs in the United States are called chemically stabilised material (CSM). They can also be referred to as cementitious stabilised materials. The latter is a general terminology that also covers soil stabilisation for subgrade improvement. 

Table 10.13 Properties of aggregates and cementitious stabilised material requirements by FAA specifications ...

Table 10.16 Typical values of properties for chemically stabilised materials...

Chemically stabilised material placed under flexible pavement Modulus of 750... 

Chemically stabilised material used as sub-base, select material or subgrade under flexible pavement rupture (M,d (psi) 250... 

The materials for capping layer may be selected granular material or cement- and lime-stabilised material, as those described in Section 10.3.1. Soil stabilisation is also recommended to be considered, when highly cohesive soil material is encountered. For details, see Section 10.3.2. 

Rigid pavement recycling is the procedure of crushing and fragmentising the concrete slab and re-using the fragmented concrete as coarse aggregate to produce a new concrete mix or base/sub-base material (stabilised or non-stabilised material). 

The stabilised austenitic stainless steels for cladding contain an alloying element (niobium), which forms stable grain boundary carbides. This prevents chromium depletion along the grain boundaries and makes the material immune to stress corrosion cracking. Non-stabilised material was used for the first layer because the thermal expansion coefficient of the material is closer to that of the low-alloy pressure vessel material. The presence of niobium in the second layer allows performance of so-called retrospective dosimetry in the RPV inner surface by machining out some scraps for further chemical separation and activity measurement to determine real neutron fluence on the RPV inner surface. 

Direct transport measurements are generally employed on thin films, tapes and coated conductors. They quickly reach their natural limits as the currents go up and/or the cross-section of the conductor increases. They are fast, i.e., can be started immediately after the magnetic field is set, and trace the I-V characteristics, which is of course most valuable if flux creep or thermally assisted flux flow (Kes et al. 1989) prevails, because the electric field is directly determined. On the other hand, must be defined by a criterion e.g., 1 [xV/cm. It will be affected by the presence of stabilising materials, the silver tube or conducting substrates, and thus generally refers to the overall Jc, wfrich can be converted to the critical current density of the superconductor if the shape and the volume fraction of the superconducting material are known. 

Strength improvement can be determined from pre- and post-treatment CPTs or laboratory tests on undisturbed samples. Proper care should be given to the selection of the stabilising material ... 

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