scholarly journals Reuse of Waste from the South West of England in Alkali-Activated Cement Concrete

2014 ◽  
Vol 629-630 ◽  
pp. 449-454
Author(s):  
Adamantia Zografou ◽  
Andrew Heath ◽  
Peter Walker
Keyword(s):  
Negative Impact ◽  
Construction Materials ◽  
Building Stone ◽  
The South ◽  
China Clay ◽  
South West ◽  
Innovative Solutions ◽  
The Uk ◽  
Risk Construction ◽  
Alkali Activated

The extraction of china clay in the South West of the UK generates waste in a mass ratio of 1:9 for china clay: waste. Currently, part of the coarser waste, “stent” and sand named “china clay sand” (CCS) in this study, is used as building stone or secondary aggregate in concrete and asphalt but the finest waste fraction, called “mica” waste, is used only for the restoration of old quarries. Looking for innovative solutions for the needs of a new Eco-town in the UK, and with regard to uses commercially applicable to construction and of low environmental impact, the china clay waste is being studied as an aggregate in alkali-activated cements (AAC). Aiming to replace primary aggregates with wastes in low risk construction materials, a series of AAC concrete based on a 50% GGBS and 50% fly ash (FA) blend and an equivalent Portland concrete series were produced. In the mixes the primary aggregate was steadily replaced by forms of the waste and tests in compression showed a decreasing trend in strength accordingly. The two series of concrete follow approximately the same ratios of decrease although in absolute values the AAC series reached higher range of strengths on the 28 day compared to the Portland series. While the use of CCS did not have any negative impact, the addition of mica decreased the strength up to 25% more.

scholarly journals What makes nature-based interventions for mental health successful?

2017 ◽  
Vol 14 (4) ◽  
pp. 82-85 ◽  
Author(s):  
Dan Bloomfield
Keyword(s):  
Mental Health ◽  
The South ◽  
South West ◽  
The Uk

Nature-based interventions for mental health are beginning to become more common in the UK. The evidence for their usefulness is building. Taking the ‘A Dose of Nature’ project in the south-west as an example, factors for making such interventions a success are described.

Identification of the training, advisory and research requirements of milk producers in the South West of England

2005 ◽  
Vol 2005 ◽  
pp. 206-206
Author(s):  
K. Clemens ◽  
J. K. Margerison
Keyword(s):  
Animal Welfare ◽  
Dairy Herd ◽  
Economic Pressure ◽  
The South ◽  
South West ◽  
Farm Efficiency ◽  
Production Diseases ◽  
The Uk ◽  
Made In

In the UK increasing economic pressure on milk producers has highlighted the need to identify key areas to optimise farm efficiency and profitability. The areas of dairy herd production diseases are a major concern and improvements made in reducing the incidence of disease will improve animal welfare and reduce costs (Kossaibati, M. A. and Esslemont, R. J., 1997)Therefore the aim this research was to identify the training, advisory and research requirements of milk producers in the SW of England.

Increasing prevalence of domiciliary ventilation: changes in service demand and provision in the South West of the UK

2011 ◽  
Vol 170 (9) ◽  
pp. 1187-1192 ◽  
Author(s):  
Sarah Goodwin ◽  
Hayley Smith ◽  
Simon Langton Hewer ◽  
Peter Fleming ◽  
A. John Henderson ◽  
...  
Keyword(s):  
The South ◽  
Service Demand ◽  
South West ◽  
The Uk

Replacing the regions: The evolution of English subnational reform

2020 ◽  
pp. 43-72
Author(s):  
John Sturzaker ◽  
Alexander Nurse
Keyword(s):  
Large Scale ◽  
Regional Scale ◽  
National Policy ◽  
The South ◽  
Urban Agglomerations ◽  
South West ◽  
Recent Developments ◽  
The Uk

This chapter examines England’s sub-national policy architecture and the ways in which successive governments have attempted to address the ‘growth gap’ between London and the rest of the UK. Following a discussion of previous initiatives such as the Northern Way, the chapter considers recent developments at the regional scale including the Northern Powerhouse, Midlands Engine and recent developments in the South West. This centres on a discussion about how cities which have been long-standing competitors can collaborate and, learning from other large scale urban agglomerations, who the key actors are to make this happen.

scholarly journals P69 Mesothelioma in the 21st century. A 1-year survey of malignant mesothelioma in the South West of the UK

Thorax ◽  
2010 ◽  
Vol 65 (Suppl 4) ◽  
pp. A106-A107 ◽  
Author(s):  
R. Bhatnagar ◽  
S. Earl ◽  
K. Lansdell ◽  
T. J. Howell
Keyword(s):  
Malignant Mesothelioma ◽  
21St Century ◽  
The South ◽  
South West ◽  
The Uk

scholarly journals Iron and Aluminium Production Wastes as Exclusive Components of Alkali Activated Binders—Towards a Sustainable Alternative

2021 ◽  
Vol 13 (17) ◽  
pp. 9938
Author(s):  
Nuno Cristelo ◽  
Fernando Castro ◽  
Tiago Miranda ◽  
Zahra Abdollahnejad ◽  
Ana Fernández-Jiménez
Keyword(s):  
Co2 Emissions ◽  
Building Materials ◽  
Negative Impact ◽  
Raw Materials ◽  
Construction Materials ◽  
Heat Of Hydration ◽  
Sustainable Construction ◽  
Alkaline Solutions ◽  
By Products ◽  
Alkali Activated

The sustainability of resources is becoming a worldwide concern, including construction and building materials, especially with the alarming increase rate in global population. Alternative solutions to ordinary Portland cement (OPC) as a concrete binder are being studied, namely the so-called alkali-activated cements (AAC). These are less harmful to the environment, as lower CO2 emissions are associated with their fabrication, and their mechanical properties can be similar to those of the OPC. The aim of developing alkali-activated materials (AAM) is the maximization of the incorporated recycled materials, which minimises the CO2 emissions and cost, while also achieving acceptable properties for construction applications. Therefore, various efforts are being made to produce sustainable construction materials based on different sources and raw materials. Recently, significant attention has been raised from the by-products of the steelmaking industry, mostly due to their widespread availability. In this paper, ladle slag (LS) resulting from steelmaking operations was studied as the main precursor to produce AAC, combined with phosphating bath sludge—or phosphate sludge (PS)—and aluminium anodising sludge (AS), two by-products of the surface treatment of metals, in replacement rates of 10 and 20 wt.%. The precursors were activated by two different alkaline solutions: a combination of commercial sodium hydroxide and sodium silicate (COM), and a disposed solution from the cleaning of aluminium extrusion steel dies (CLE). This study assesses the influence of these by-products from the steelmaking industry (PS, AS and CLE) on the performance of the alkali-activated LS, and specifically on its fresh and hardened state properties, including rheology, heat of hydration, compressive strength and microstructure and mineralogy (X-ray diffraction, scanning electron microscopy coupled with energy dispersive spectroscopy and Fourier transform infra-red. The results showed that the CLE had no negative impact on the strength of the AAM incorporating PS or/and AS, while increasing the strength of the LS alone by 2×. Additionally, regardless of the precursor combination, the use of a commercial activator (COM) led to more fluid pastes, compared with the CLE.

The impact of pregnancy weight and glucose on the metabolic health of mother and child in the south west of the UK

Midwifery ◽  
2004 ◽  
Vol 20 (3) ◽  
pp. 281-289 ◽  
Author(s):  
Alison N. Jeffery ◽  
Linda D. Voss ◽  
Brad S. Metcalf ◽  
Terence J. Wilkin
Keyword(s):  
Metabolic Health ◽  
The South ◽  
South West ◽  
Mother And Child ◽  
The Uk ◽  
Pregnancy Weight ◽  
The Impact
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