Viability of using concrete residue to produce compacted soil blocks
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Transcript of Viability of using concrete residue to produce compacted soil blocks
Arquiteta e Urbanista, Doutora em Arquitetura e Urbanismo pela UnB, docente na Escola de Agronomia da UFG e na Escola de Arquitetura da PUC Goiás
+55 62 9974-6456, [email protected]
Arquiteto e Urbanista, docente na Escola de Arquitetura da PUC Goiás, coordenador de projetos da Companhia de Saneamento de Goiás – SANEAGO+55 62 8188-1150, [email protected]
Waste 101 - Viability of using concrete residue to produce
compacted soil blocks
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS 3
Intr
oduc
tion Housing deficit
Urbanization Purchasing power X cost of buildings Searching for alternative methods of construction
Brazil
N
Goiás
N
Goiânia
N
Northwest region of Goiânia Housing conditions
4VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Sustainability Natural resources X buildings Materials development Soil-cement blocks CSB’s-SCR cement mortar and sand
Intr
oduc
tion
Construction
Soil-cement blocks
Walls
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Goa
ls
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Develop, test and evaluate the use of cement mortar and sand in the manufacture of new component, called CSB (compressed soil block)-SCR (soil-cement-residue)
in vertical sealing of buildings in general but, in particular, in social housing.
a) To investigate if the residue constitutes an alternative to improve the properties of certain types of soil for the manufacture of CSB's.
b) To contribute with studies on the disposal of waste generated by the construction works in order to collaborate in the preservation of the
environment.
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Soil(raw material)Clayey-sandy
Excavations works in Goiânia
Cement(stabilizing)CP II Z 32
Portland with pozzolan brand Tocantins
Cement mortar and sand
(replacement and correction of the raw
material)Mixture of cement, sand and water extrated from
a building
Expe
rimen
tal
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Materials
7VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Expe
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tal
1. Physico-chemical characterization
Preparation and characterization of soil samples, cement residue and mixtures.
Procedures
Lump breaking Quartering Determination of hygroscopic moisture
Colleted residue Lump breaking Quartering
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Expe
rimen
tal
2. Physico-mechanical characterization
Definition of dosages compositions with 12,5% cement and 0%, 20%, 40% and60% of waste to replace the soil mass were studied, determining 4 treatments(according table 1).
Table 1 - Dosages of mixtures: soil, cement and residue
Compound Soil (%) Cement (%) Residue (%)
Treatment 1 SCR0 100 12,5 0
Treatment 2 SCR20 80 12,5 20
Treatment 3 SCR40 60 12,5 40
Treatment 4 SCR60 40 12,5 60
Procedures
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Expe
rimen
tal
2. Physico-mechanical characterization
Procedures
Sedimentation Compaction Demolding
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Expe
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3. Production CBS’s-SCR
Procedures
Press Production block 76 molded blocks
25
6
7,5
12,5
Block dimensions (cm)
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Expe
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tal
3. Production CBS’s-SCR
Definition physical-mechanical properties CSB's-SCR by means of absorptionand durability, both at 7 days, and resistance to simple compression at 7 and 28days of age (according table 2).
Procedures
Table 2 - Blocks tested
CSB-SCR
Quantity of blocks
Compression Absorption Durability Total
7 days 28 days 7 days 7 days 19
Treatment 1 SCR0 6 7 3 3 19
Treatment 2 SCR20 6 7 3 3 19
Treatment 3 SCR40 6 7 3 3 19
Treatment 4 SCR60 6 7 3 3 19
Total 24 28 12 12 76
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Weighing in blocks absorption test
100 x M
MMA1
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VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Expe
rimen
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4. Continuation of physico-mechanical characterization
Absorption at 7 days of age.
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Prisms in test to simple compression
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Expe
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4. Continuation of physico-mechanical characterization
Resistance to simple compression at 7 and 28 days of age
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Blocks in immersion and in the oven
100 x P
PPP1
12m
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
Expe
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4. Continuation of physico-mechanical characterization
Durability at 7 days of age.
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Resu
lts The results show that all the compositions with residue, are indicated forthe manufacture of CSB, however, the compound with 20% residueshowed the best result.
Compaction Assay
1,48 1,50 1,52 1,54 1,56 1,58 1,60 1,62 1,64 1,66 1,68 1,70 1,72 1,74
10,00 15,00 20,00 25,00
Max
imum
dry
bul
k den
sity
(g/c
m³)
Optimum moisture content (%)
SCR0 SCR20 SCR40 SCR60
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
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17,00
18,00
19,00
20,00
21,00
22,00
23,00
SCR0 SCR20 SCR40 SCR60
Abso
rptio
n(%
)
Treatments
Evolution of absorption Standard limit value recommended
Absorption test
Resu
lts
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
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0,0
0,5
1,0
1,5
2,0
2,5
3,0
SCR0 SCR20 SCR40 SCR60
Com
pres
sive
stre
ngth
(MPa
)
Treatments
7 days 28 days Standard minimum recommended
Resu
lts
Testing of compressive strength
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
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0,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
SCR0 SCR20 SCR40 SCR60
Mas
s los
s (%
)
Treatments
Evolution of mass loss Limit value recommended
Resu
lts In general, it is considered the soil substitution by sand mortar residue aneconomic and sustainable alternative for the production of buildingcomponents, that meets the criteria of modular coordination, mechanicalstrength, absorption of water and durability.
Durability test
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
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Conc
lusi
ons
The manufacturing of compacted soil blocks with sand mortar residuecontributes in a beneficial way in the discussion about constructionprocesses using new modular components, mainly when they arealternative to the use of discard materials that would otherwise bedumped inappropriately.
Therefore, it is concluded that replacing part of the soil residue ofcement and sand, yielded a product that met the criteria of absorption,strength and durability needed for the proper performancecharacteristics of buildings, and they were proven conditions use, fromthe technical analysis and cost.
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Refe
renc
es CORDEIRO, M. The dream of home ownership in the promised land: housing policies in fields Goyatacazes (1989-2004). Masters dissertations. RJ, 2004.
FIGUEROLA, V. Soil-Cement Masonry. Ed Magazine Téchne 85, Sao Paulo - SP: Editora Pini, 2004.
GRANDE, F. M. Manufacture of Bricks Modular Soil-cement by pressing Manual With and WithoutAddition of silica fume. Master Thesis. Sao Carlos - SP: School of Engineering of São Carlos - EECS, University of São Paulo - USP, 2003.
NEVES, C. M. M. Bricks Soil-Cement. In: Ten Eco-Friendly Alternatives to Housing. Proceedings, p.141-166. Brasilia - DF: MHU / UNDP, 1989.
NBR 7180: Soil - Determination of plasticity limit. RJ, 1984.
NBR 6508: Grains of soil that pass through the sieve of 4,8mm - Determination of specific mass. RJ, 1984.
NBR 6459: Soil - Determination of liquidity limit. RJ, 1984
NBR 10834: Soil-cement block without structural function - Requirements. Rio de Janeiro, 2012.
NBR 10836: Soil-cement block - Dimensional analysis, compressive strength determination and waterabsorption - Test method. Rio de Janeiro, 2013.
NBR 13554: Soil-cement - Durability test by wetting and drying - Test method. Rio de Janeiro, 2012.
Segantini, A. A. S; ALCÂNTARA M. A. M. Soil and Soil-Cement-Cal. In: Principles of Civil and MaterialsScience and Materials Engineering Building. 1st. Ed v.2. São Paulo - SP: Ibracon, 2007.
VIABILITY OF USING CONCRETE RESIDUE TO PRODUCE COMPACTED SOIL BLOCKS
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Fabíolla Xavier Rocha Ferreira Lima+55 62 9974-6456, [email protected]
Flávio Araújo+55 62 8188-1150, [email protected]
Waste 101 - Viability of using concrete residue to produce compacted soil
blocks
