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Durability of Concretes with Marble Powder
Rabah Chaid1,
, Arnaud Perrot2 and Youcef Ghernouti
1
1Laboratory of Mineral & Composite Materials, University of Boumerdes, Algeria
2University of Brittany the South of Lorient, French
Abstract. The aim of this study is to examine the valorisation of mineral residues as addition in building
materials with cementious matrix, and contributes to sustainable development. The study is based on
experimental work carried out at the Civil Engineering and Mechanical Engineering Laboratory (INSA-
Rennes, France) and at the Mineral and Composite Materials Laboratory (University of Boumerdès, Algeria).
The use of recyclable industrial waste as a partial replacement of Portland cement in concrete allows
reduction of greenhouse gas emissions (GGE) and results in the manufacturing of a concrete with less
environmental impact. Applying various experimental techniques, the behaviour of finely crushed marble
powder addition with Portland cement, with limestone addition, is studied. This study confirmed the
improvement of the physical and chemical properties of concretes with marble powder addition; this
indicates the potential advantage of using this supplementary cementitious materials.
Keywords: HPC, marble, durability, sulfate
1. Introduction
The management of waste and industrial by-products is crucial for the technical, economic and
environmental benefit of society as a whole and business in particular. These factors should include, for
example, the life cycle analysis of products or services, thus integrating into these processes the management
of residues and by-products. Engineering and environmental studies can facilitate this management,
particularly in civil engineering [1-2]. Moreover, the building materials sector is responsible for 9.5 % of the
total anthropogenic emissions of carbon dioxide in Europe. About 80% of this amount comes from cement
production, then it seems that reducing the amount of cement in concretes and mortars has become a priority
[3]. One way for cement and concrete industries to do so is the substitution of clinker with mineral additions.
In recent years, many studies have focused on the ordinary Portland cement supplementation by industrial
by-products [4].
The use of industrial waste and reducing the demand for natural resources (such as limestone and iron
ore) are beneficial. It is also important to note that the concrete with supplementary cementitious materials
(SCMs) generally have a lifespan longer than conventional concrete [5].
The most aggressive environments for concrete are saline and sulfate environments, these represent a
major hazard by virtue of chemical attack on the concrete. A survey by the OECD (Organization for
Economic Cooperation and Development) conducted in 1989 indicates that the sulfate attack is the second
leading global cause of damage; this type of attack being detected on 800 000 structures.
Given the denser structure of high-performance concretes (HPC), these materials exhibit a better
behaviour towards aggression mechanisms. Most degradation processes are caused by the penetration of
aggressive substances, such as chlorides, carbon dioxide, acids and sulfates. If this penetration is impeded, as
in the case of HPC, the degradation processes will not manifest itself until much later in the service life.
Corresponding author. Tel +21324913866, Fax +21324913866 E-mail address: [email protected]
2015 5th International Conference on Environment Science and Engineering
Volume 83 of IPCBEE (2015)
DOI: 10.7763/IPCBEE. 2015. V83. 6
33
By using various experimental techniques, special care is given to the behaviour of the finely ground
marble powder together with Portland cement containing limestone addition. The use of Marble powder as a
SCM has already been studied in the recent literature, especially for SCC mix design [6-7-8]. However, none
of this study focuses on the durability behaviour containing marble powder. Depending on the nature of
SCMs considered, their different behaviour may influence the design of the concrete mixes with an impact
on their durability. This study confirmed the improvement of physico-chemical properties of concrete with
marble powder, which presents a strong argument for its use as a concrete addition.
2. Materials Used
2.1. Cement
The Portland cement has a Blaine Specific Surface (BSS) of 3830 cm2/g. It is a CEM II / A 42.5 clinker
with addition of 10% limestone. The cement is marketed by Egyptian Orascom Group (Algerian Cement
Company). The X-ray diffraction analysis of the anhydrous cement is shown on Fig. 1.
The XRD pattern shows the presence of different crystalline phases: the four essential minerals (C3S,
βC2S, C3A and C4AF) which are responsible for setting and hardening; gypsum, (CaSO4.2H2O) regulate
setting time; and limestone filler addition.
Fig. 1: XRD pattern of CEM II / A 42,5 (λkα Cu).
2.2. Marble powder (PM)
The marble power used is a waste product from marble masonry. The micro analysis performed over a
wide range of points shows identical chemical compositions (Fig. 2).
Fig. 2: Micro analyse EDS of the marble powder.
The Particle Size Distribution (PSD) was measured in ethanol using a laser granulometer CILAS 1180;
the results are shown in Fig. 3. The marble powder has a Blaine specific surface of 12 000 cm2 / g. The key
point that emerges from the results, summarized by granulometric fineness, is that the powder is well graded.
50% of the marble powder particles are finer than 4 microns and 77% are finer than 10 microns.
C calcite
G gypsum ▲ C3S
► βC2S
◄ C4AF
♠ C3A
Position [°2Theta]
Counts
225
100
25
0
10 20
40 50
Element %Mass %Atomic
C K 17.44 27.42
O K 47.20 55.73
Mg K 0.31 0.24
Al K 0.16 0.11
Si K 0.26 0.18
Ca K 34.64 16.32
Totals 100.00
34
Approximately 95% of particles are finer 20 microns. Based on the coefficient of uniformity (Cu), the
powdered marble has a tight distribution.
Fig. 3: Granulometric curve for marble powder.
2.3. Aggregates
An optimized concrete mix design necessarily involves the determination of optimum mass ratios of
various aggregates. The coarse aggregate are crushed gravel from the Jaubert quarry (Algeria), and is mainly
limestone.
In this study, after preliminary tests on both the rheology of concrete mixtures at fresh state and the
mechanical behaviour at hardened state, the granular classes 3/8 and 8/15 were chosen.
The sand consists of a mix containing 76% of Akbou Sand and 24% of Boussaâda Sand (Algeria), the
final fineness modulus after homogenization is 2.60.
2.4. Admixtures
In order to ensure required workability, the incorporation of a water-reducing superplasticizer is
necessary. The molecules of superplasticizer are adsorbed on the cement grains surface at the interface with
the mix water. Once adsorbed, the superplasticizer molecules induce a steric effect that increases the distance
between cement particles. As a consequence, the cement grains network is weakened [9-10]. The resulting
dispersion reduces the viscosity and the yield stress of the cement paste and increases workability; the
molecular structure of the polymeric superplasticizer - in the form of long chains - reinforces this effect.
The admixture used is Viscocrete 3045, an unchlorinated water reducer plasticizer, based on modified
polycarboxylates, it provides a good workability for up to 1h 30.
In fluid concrete, Viscocrete 3045 improves stability of the concrete, reduces the risk of aggregates
segregation and makes the mix less sensitive to small variation in water and constituents mass ratio.
Table 1: Composition of the concretes studied
Constituents Composition
CC CMP
Cement kg/m3 400 360
Sand kg/m3 612 612
Aggregate (3/8) kg/m3 108 108
Aggregate
(8/15)
kg/m3 1064 1064
Water l/m3 136 136
Admixture l/m3 7.2 7.2
Marble (MP) kg/m3 - 40
3. Experimental Program
Perc
en
tag
e p
assin
g %
Particle size µm
35
The compositions of concretes with and without powdered marble are used in the experimental program
as reported in Table 1. It should be noted that the levels of marble powder addition (MP) and superplasticizer,
after optimization, are respectively 10% and 2% of the cement mass. For reported tests the following legend
is adopted.
3.1. Types of concrete
CC: Control Concrete
CMP: Concrete with Marble Powder
The physical, mechanical and microstructure of concrete with and without addition of marble powder are
compared. In addition, mineralogical characterization techniques have been carried out which include X-ray
diffraction (XRD), differential thermal analysis and gravimetric analysis (DTA-TGA) and scanning electron
microscopy (SEM) combined with a micro analysis (EDS).
4. Results and Analysis
The aim of this study is to examine the durability of concrete exposed to sulfates; the resistance of
concrete to sulfate attack being an important factor for durability.
The origin of sulfate contamination of concrete is diverse; internal sources namely the material itself
(aggregates containing gypsum or sulphides; gypsum cement used as a retarder ...); external sources of
sulfates from exposure to the ambient environment (sewage, industrial pollution, groundwater and
seawater ...). In these cases the sulfate migrated into the cement matrix by diffusion thus attacking the
integrity of the concrete. The sulfate can alter the concrete in two physico-chemical ways, expansion and / or
loss of binding properties of the CSH.
4.1. Strength
It is noted that the compressive strength of concrete with marble powder addition, with a very tight
particle size distribution (Fig. 4) as used in this study, has a higher strength than the control one for all stages
of maturity. It is concluded that these are high-performance concretes; this property is not altered by the
surrounding environment (Fig. 5). This can be attributed to the fact that the specific surface of marble
powder is higher than the one of cement. Then, marble powder adsorbs more water than cement. As a result,
the ratio of water available for hydration is reduced leading to better mechanical strengths.
0
20
40
60
80
3 7 28 90
Age (days).
Fig. 4: Evolution of compressive strength with relation to age
4.2. Capillary absorption
Capillary absorption of the samples is determined; the results obtained confirm the low capacity of water
absorption for concrete with marble powder addition compared to the control concrete; this is an indication
of an increased compactness of the concrete. This can be attributed to the fineness of the marble powder that
reduces the pore size distribution compared to control concrete. In addition to their high strength the samples
have improved durability. The marble powder addition will retard the penetration of aggressive agents,
including the sulfate ions within the concrete matrix.
CMP
CC
Co
mp
ress
ive
Str
ength
M
Pa
36
0
2
4
6
8
10
12
1h 2h 3h 4h 2j 3j 7j 11j
Square root of time (h).C
ap
illa
ry
ab
sorp
tio
n c
oeff
icie
nt
(%).
CC
CMP
Fig. 5: Evolution of capillary absorption coefficient.
4.3. Measurement of oxygen permeability
This method is applicable to moulded samples and cores that are within the dimensional tolerance limits
imposed by the apparatus. The technique can measure permeability ranging between 10-15 and 10-20 m2
[11].
The test consists of submitting a cylindrical sample to a constant pressure gradient of oxygen. The
permeability thus is determined from the measurement the oxygen flux at a steady flow. This test is
performed on five specimens at three pressures (2, 4 and 6 bar absolute). An average permeability value is
computed. The three samples, from the group of five, that exhibit the permeabilities closest to the average
are considered as the most representative of the material [12].
0,00
0,50
1,00
1,50
2,00
2,50
0,50 0,25 0,17
Reciprocal of the applied pressure (MPa).
Fig. 6: Oxygen permeability of the concretes.
Regardless of pressure, the addition of finely crushed marble powder led to a significant decrease in the
coefficient of permeability to oxygen. For example, at a pressure of 6 bar, Ka is 2.3 10-16
m2 for concrete
control, and 1.3 10-17 m
2 for concrete with marble powder addition (Fig. 6). Those results are consistent with
the capillary absorption coefficient.
4.4. Internal Microstructure
The physico-chemical analysis, by XRD shows that the hydration process corresponding to different
cement paste phases leads to a more or less well crystallized structure. The components identified after three
months conservation in calcium sulfate solution are shown in Fig.s 7 and 8.
For all compositions studied hydration leads to the formation of portlandite CH, calcite CC and a silica-
hydrate CSH gel. The three major diffraction peaks of CSH are not clearly identified, reflecting its low
degree of crystallization. XRD analysis indicates that ettringite C3A.3CaSO4.31H2O is present in the
hardened paste after a period of three months.
Ox
yg
en p
erm
eab
ilit
y (
10
-16 m
2).
CMP
CC
37
Fig. 7: XRD pattern of the hardened CEM II 42.5 cement paste after three months conservation in calcium sulfate
solution.
The results indicate that the sulfate attack, initiated by gypsum, induces a weak precipitation of ettringite;
the most stable environment for this compound being a pH greater than 10.5. In the sample without marble
addition, it appears that the sulfate attack is more pronounced. This reaction occurs in an environment where
ettringite is more stable.
Finally, one can note the significant and growing presence of calcite resulting from the carbonation of
hydrated phases, mainly portlandite, in the samples; also from mineral limestone and marble powder. The
differential thermal analysis is used to verify the XRD observations.
Fig. 8: XRD pattern of hardened CEM II 42.5 cement paste with marble addition after three months conservation in
calcium sulfate solution.
4.5. Thermo-gravimetric Analysis
The thermo-gravimetric analysis (Fig.s 9a and 9b) show essentially three mass losses which respectively
characterize the loss of water molecules of CxSyAtHz and C6AS3H32 without differentiating the portlandite
dehydration and the de-carbonation of CaCO3 (initial and newly formed CaCO3). However, this method does
not detect the presence of monocarboaluminate C4ACH11 or hydrated alumina.
The endothermic effect at temperature of 450-550 °C, expresses the presence of remaining free hydrated
lime crystals [13-14].
The thermo-gravimetric analysis shows the initial loss of free water; for the CEM II paste at a higher
temperature (146 ° C) than from that CEM II with marble powder addition (127 °C). Conversely, the amount
of water released is somewhat higher (24.23%) as opposed to 19.10% for the CEMII plus marble addition;
this is a consequence of the fineness of the marble powder, whose demand for water is higher and in parallel
evaporation temperature is lower.
C Calcite
▲ C3S
► βC2S
◄ C4AF
P Ca(OH)2
E Ettringite
Counts
225
100
25
0 10 20 30 40 60 50
Position [°2Theta]
Counts
225
100
25
0
10 20 30 40 60 50 Position [°2Theta]
C Calcite
▲ C3S
► βC2S
◄ C4AF
P Ca(OH)2
E Ettringite
38
Fig. 9: thermo-gravimetric analysis of CEM II 42.5.
The formation of portlandite in the cement paste with marble addition is lower, due to the partial
replacement of cement with marble powder. Dehydration for the former being 4.28% compared with 3.28%
for latter.
Finally, in the temperature range 740-840 °C progressive de-carbonation of carbonates occurs. In this
case, the endothermic peak for the cement paste with addition is more pronounced; marble powder addition
causes a mass loss of 5.03% as opposed to 2.32% for cement paste without addition.
These results confirm the beneficial effect of finely crushed powder marble filler. The properties of
concrete and cement pastes, in terms of compressive strength, capillary absorption and gas permeability are
improved. The impact of marble powder on microstructures, in terms of densification of matrix and
modification of porosity is very pronounced.
5. Conclusions
The partial replacement of cement by marble powder does not contribute to the formation of a significant
volume of hydrated products capable of reducing porosity, however the compressive strength may be
improved to a greater or lesser extent.
The marble powder can efficiently supplement cement in concrete; this structural contribution manifests
itself by the reduction of porosity and consequently a greater resistance to chemical attack.
The concrete with the addition of marble powder with a specific surface of 12,000 cm2/g offers
interesting advantages over the conventional control concrete: higher strength, improved durability against
physico-chemical absorption; the absorption of capillary water is reduced as is the permeability. This should
lead to improved freeze thaw resistance, although this remains to be verified.
In addition to its obvious ecological impact, re-use of waste marble dust and its integration in concrete
has great advantages in terms of long-term maintenance resulting from the improved durability of structures.
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